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Tools of Japan

Steel_Rain

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Apr 23, 2024
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1,344
I believe it was one of your earlier posts that got me interested in these. Didn't you score a full set of the TOP metric versions as well?

Now that I see your picture I'm going to have to go on a hunt for the big boy 3/4"-7/8"

I'm glad you found value in that. And yes, I have a the full set of the TOP metric versions of these as well (made in Japan):

1761830477503.png

I was lucky to find the SAE versions as a low use, complete set. The Facebook post for those was diamond in the rough and I haven't seen a complete set come up on eBay in awhile.
 
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Andres26tnt

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May 11, 2018
Messages
994
Anyone know where to source a replacement spring for a Nepros 3/8" ratchet direction selector? Mine shot across the shop when I was trying to take it apart to fix a binding issue. I've emailed Nepros, but haven't heard back yet.

If I ever go back to Tokyo or any big city I can get you one. Unfortunately I have zero dealers close to me here in northern Japan. But idk if they sell individuals, it's probably a head rebuild kit.
 

Wrench-Polisher

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Joined
Aug 29, 2025
Messages
300
Location
DEEP in the rusty rust of rust belt
Anyone know where to source a replacement spring for a Nepros 3/8" ratchet direction selector? Mine shot across the shop when I was trying to take it apart to fix a binding issue. I've emailed Nepros, but haven't heard back yet.
Hire an amateur gunsmith. They are experts at finding detents and little levers flying across the room.
 

lund

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Joined
Nov 2, 2019
Messages
765
Location
Michigan
Had to remove a decorative cover from a domestic radiator today. No problem, except that one of the screws is almost impossible to access when the rad is plumbed in.

Koken R810B to the rescue.

These simple tools would be overlooked by many, being relatively old tech. The secret however, is in the dedicated short bits with their integrated retention detent.

I don’t own any screwdriving tool with a lower overall height than these.
IMG_2258.jpegIMG_2259.jpeg
I use one of these and can vouch they are pretty good in spite of the coarse ratchet. They are about as low profile as you can get with a ratchet so they can solve time to time obstruction problems pretty well. A simple plate with bit might be slightly lower profile. But those are also a big pain to use. This device is about as good a you can get in low profile for a ratchet and holds the bits securely.
 
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00 Scrub

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Joined
Apr 13, 2024
Messages
60
If I ever go back to Tokyo or any big city I can get you one. Unfortunately I have zero dealers close to me here in northern Japan. But idk if they sell individuals, it's probably a head rebuild kit.
thanks. Even if someone has a rough size/coil/rate I think I can just get one on McMaster.
 

M.Jay

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Joined
Nov 3, 2025
Messages
214
Location
Southern Germany
Anyone know where to source a replacement spring for a Nepros 3/8" ratchet direction selector? Mine shot across the shop when I was trying to take it apart to fix a binding issue. I've emailed Nepros, but haven't heard back yet.
Their customer service is usually quite good, but sometimes slow. They once mailed me two replacement screws for the faceplate in an envelope free of cost.

thanks. Even if someone has a rough size/coil/rate I think I can just get one on McMaster.
I can get some measurements from my ratchet for you. Do you have the NBR390 or the newer NBR390A?
 

00 Scrub

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Apr 13, 2024
Messages
60
Thanks, I'll give it a bit more time. It's been less than 1 week.

I have a NBR390AFL.
 

00 Scrub

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Apr 13, 2024
Messages
60
Alright, there you go:

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IMG_0343_K.JPG

Thanks, that is super helpful!
I think if they don't get back to me I'll order this spring and see if it works:
 

Steel_Rain

Well-known member
Joined
Apr 23, 2024
Messages
1,344
Panasonic EY-6225:

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Got this to complement my EY-7410:

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Despite being NoS, the battery charges just fine (NiMh). I may do a LiPo conversion on the pack at some point. I love the fact that the driver, battery pack and the charger are all made in Japan.

I’ve always liked the design of these “pen” electric screwdrivers. Despite the age, they work great for small assembly work and don’t annoy me like the larger frame, drill based screw guns.
 

GeoBruin

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May 5, 2018
Messages
3,738
So according to @jsackin, we're going to get Koken Z series sockets in SAE sizes (at least in 3/8 drive). I haven't heard/seen anything else about it, so I don't know if that means semi-deep as well. I seem to be the exception around here in that I use SAE a lot, but is anyone else looking forward to this?
 

moemc

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Joined
Mar 12, 2025
Messages
356
So according to @jsackin, we're going to get Koken Z series sockets in SAE sizes (at least in 3/8 drive). I haven't heard/seen anything else about it, so I don't know if that means semi-deep as well. I seem to be the exception around here in that I use SAE a lot, but is anyone else looking forward to this?
I am now. Not because I use SAE sockets. But the risk of it possibly occurring does not need to be very high to sell me a set of Koken sockets.
 

mattstevens

Active member
Joined
Jun 3, 2023
Messages
44
So according to @jsackin, we're going to get Koken Z series sockets in SAE sizes (at least in 3/8 drive). I haven't heard/seen anything else about it, so I don't know if that means semi-deep as well. I seem to be the exception around here in that I use SAE a lot, but is anyone else looking forward to this?

Looks like only 3/8 shallow for now. Also, locking wobble-fixed extensions:


They have placeholders for the new stuff on their site:

 

Dave455

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Joined
Mar 19, 2013
Messages
5,802
Location
Sussex, England
So according to @jsackin, we're going to get Koken Z series sockets in SAE sizes (at least in 3/8 drive). I haven't heard/seen anything else about it, so I don't know if that means semi-deep as well. I seem to be the exception around here in that I use SAE a lot, but is anyone else looking forward to this?
My gut feeling is that there is a fair demand for this worldwide from the aviation industry.

I know that KoKen already offer “aerospace” grade tools in their regular line, but the Z series tools strike me as being particularly suited to aviation requirements, particularly light aircraft.

More choices are always welcome.
 

Dave455

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Mar 19, 2013
Messages
5,802
Location
Sussex, England
Doesn't aviation tend to be 12 points? Be interesting if we get some 12 points Z series sockets.
The industry does tend to use 12 point sockets, but that’s partly historical, and partly because the fasteners are good quality so sometimes you can use either 6 point or 12 point sockets.

Airliners, and some turbine engines, tend to use 12 point, so if you’re working on those 12 point are a must. If you’re working on light aircraft, less so.

12 point (technically bi-hex) are the more versatile option for sure. Maybe we will see those over time.
 
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CGarage

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Joined
Nov 23, 2018
Messages
2,995
Location
United States/Switzerland
I think there is a big profit center in Aviation tooling, and I am seeing other manufactures, like Facom, ramp up aviation product offerings for both military and consumer markets.
 
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twagler

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Joined
Jun 29, 2016
Messages
103
Location
Ottawa, Canada
I have been looking for a drill press vice and ran across one made in Japan that is a 4 inch. Is this something good or unique??
Definitely not unique, since many drill press vises, machinist vises, and bench vises have been imported from Japan over the years. Eron is a common brand, and is considered of mid-tier quality. I have a K.K.K. branded milling machine vise that is of quite high quality. Japan had a strong local industry in the late 1960s/early 1970s for building machine tools of all sorts, many which are well-regarded and of high quality. But don't forget - decades ago the country of Japan used to be the equivalent to what China is today and also exported to North America a lot of low quality stuff too.
 

Steve_P

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Joined
Sep 15, 2010
Messages
5,182
So according to @jsackin, we're going to get Koken Z series sockets in SAE sizes (at least in 3/8 drive). I haven't heard/seen anything else about it, so I don't know if that means semi-deep as well. I seem to be the exception around here in that I use SAE a lot, but is anyone else looking forward to this?

I used inch sized sockets for decades on 1960s-80s US made vehicles. But I always had plenty of access with standard short sockets and round head ratchets. Also never needed a ratcheting wrench.... New vehicles are another story altogether.

So, no, I won't be buying them. But I do have some metric Koken Z sockets. I'm actually surprised that they bothered to make them because I don't see much of a market- people that work on old cars are typically over 50 and have had the necessary tools for decades. Unless, like Dave said, there is a demand in aviation- even though they've functioned without them forever.

Do you actually need them, or is it just a want because this is GJ, you like Koken, and maybe you'll need them someday?
 

Ohio Andy

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Jul 31, 2024
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2,265
Location
Columbus, Ohio
I have been looking for a drill press vice and ran across one made in Japan that is a 4 inch. Is this something good or unique??
I have a tiny drill press and I've inherited at least one drill press vise. Maybe I have multiple. I'm not even sure... I should pull one out and figure out what I'm going to do with it. Should either use it or get rid of it... You've inspired me. Would have belonged to one of my grandfathers
 

Wrench-Polisher

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Aug 29, 2025
Messages
300
Location
DEEP in the rusty rust of rust belt
I used inch sized sockets for decades on 1960s-80s US made vehicles. But I always had plenty of access with standard short sockets and round head ratchets. Also never needed a ratcheting wrench.... New vehicles are another story altogether.

So, no, I won't be buying them. But I do have some metric Koken Z sockets. I'm actually surprised that they bothered to make them because I don't see much of a market- people that work on old cars are typically over 50 and have had the necessary tools for decades. Unless, like Dave said, there is a demand in aviation- even though they've functioned without them forever.

Do you actually need them, or is it just a want because this is GJ, you like Koken, and maybe you'll need them someday?
Quite frankly these cars are so f-ing old that your GRANDKIDS have to build their own toolbox and yes also aviation.
With all due respect but grandpas craftsman rachet ***** and the sockets are all boogered up.
Z series sockets are GREAT for aviation due to fit.
Could also me this unhealthy compunction I see around here, whatever you get in metric you also have to have in SAE
 

GeoBruin

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Joined
May 5, 2018
Messages
3,738
Do you actually need them, or is it just a want because this is GJ, you like Koken, and maybe you'll need them someday?

Do I actually need them? Absolutely not. I'm a hobbyist. I don't need any of my tools. But this forum doesn't exist because a bunch of career techs need a place where they can discuss how few tools they actually need to do their jobs. It exists because enthusiasts like tools and discussing their merits and uses.
 

Ohio Andy

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Jul 31, 2024
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Location
Columbus, Ohio
Could also me this unhealthy compunction I see around here, whatever you get in metric you also have to have in SAE
I might use SAE more often than Metric.... I was dealing with stripped threads so I went to the next closest size up, which means metric, and I tapped all off the threads to match the replacement Metric bolt. When the unit was sent in for standard service, it came back using different SAE bolts. I did not need to take it apart so I just let it be.
 

A&P mechanic

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Joined
Sep 6, 2012
Messages
324
Location
FL
Hi GJ,

  • Does anyone have a recommendation for a made in Japan thin wrench set?

A complete metric set would be perfect, but I found most sets are missing sizes and I can live with that.
What I have found searching this thread is these brands: Ashai, Top and KTC profit make sets.

KTC Profit
10x12, 12x14, 17x19

Ashai
part number SNT0800
8x9, 12x11, 11x13, 14x17, 19x21, 22x23, 24x27, 24x27, 30x32

Top Wrenches
part number CU-5000
8x9, 10x11, 12x13, 14x17, 19x21

I really only need up to like 19mm but I would get the larger set with the bigger sizes/32mm for those just in case moments.
I will probably buy it off Ebay since Amazon Japan may cost more than in years past.
I am leaning towards Ashai but if even wants to sway my decision to another Japanese brand, I’m all ears. Thank you!
 

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Caa311

Well-known member
Joined
Jan 2, 2016
Messages
762
Location
Virginia
Hi GJ,

  • Does anyone have a recommendation for a made in Japan thin wrench set?

A complete metric set would be perfect, but I found most sets are missing sizes and I can live with that.
What I have found searching this thread is these brands: Ashai, Top and KTC profit make sets.

KTC Profit
10x12, 12x14, 17x19

Ashai
part number SNT0800
8x9, 12x11, 11x13, 14x17, 19x21, 22x23, 24x27, 24x27, 30x32

Top Wrenches
part number CU-5000
8x9, 10x11, 12x13, 14x17, 19x21

I really only need up to like 19mm but I would get the larger set with the bigger sizes/32mm for those just in case moments.
I will probably buy it off Ebay since Amazon Japan may cost more than in years past.
I am leaning towards Ashai but if even wants to sway my decision to another Japanese brand, I’m all ears. Thank you!
I have that wrench holder on a set of their combo wrenches. Does really well in my toolbag.
 

Dave455

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Joined
Mar 19, 2013
Messages
5,802
Location
Sussex, England
Hi GJ,

  • Does anyone have a recommendation for a made in Japan thin wrench set?

A complete metric set would be perfect, but I found most sets are missing sizes and I can live with that.
What I have found searching this thread is these brands: Ashai, Top and KTC profit make sets.

KTC Profit
10x12, 12x14, 17x19

Ashai
part number SNT0800
8x9, 12x11, 11x13, 14x17, 19x21, 22x23, 24x27, 24x27, 30x32

Top Wrenches
part number CU-5000
8x9, 10x11, 12x13, 14x17, 19x21

I really only need up to like 19mm but I would get the larger set with the bigger sizes/32mm for those just in case moments.
I will probably buy it off Ebay since Amazon Japan may cost more than in years past.
I am leaning towards Ashai but if even wants to sway my decision to another Japanese brand, I’m all ears. Thank you!
I’ve used, but don’t own, the KTC Profit and they are really very nice.

You didn’t say if you wanted open end, box end or combination, but all three styles are available in the profit.

Each wrench is only one size, with a different offset at each end on the box end and open end.

The “sets” they offer in the Profit are only 5 piece as far as I can recall, but I don’t see that’s an issue. Just add the sizes you want.

These are quite high quality tools.
IMG_2531.jpegIMG_2529.jpegIMG_2528.jpeg
 

A&P mechanic

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Joined
Sep 6, 2012
Messages
324
Location
FL
I just pulled up KTC’s catalog and KTC Profit does make wrenches up to 19mm, so that is good news.
The set has 8, 10, 12, 13, 14 then adding on singles 15, 17, 19.

I am looking at open end wrenches.
I have a Channelock thin adjustable wrench but in my opinion, it is not that thin and does not fit in places.
Therefore, I used a bench grinder on a 6 inch adjustable wrench to make it thinner than the Channelock adjustable.
I think it is a Fuller/Japan adjustable but am going to get a set of thin wrenches instead.

2 votes for Profit and 1 vote for Ashai so far.

I’m going to order a set of then wrenches and I’ll post a picture when they arrive in a few weeks.
I appreciate the insight!
 

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Steel_Rain

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Joined
Apr 23, 2024
Messages
1,344
IMG_8884.jpg
They are beautiful! Both are my go-to for just about anything automotive.

thanks to TheRealbastard

He really is the real *******. He has cost me lots of money on tools I didn't even know I "needed".

God damnit. :ROFLMAO:
 
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