I have those exact same Torx bits and hex bits. Koken offer, I think, four different lengths but I thought the shortest would be the most useful in the first instance.
The fit of the Torx bits is comparable to other quality brands. I have some Snap On, some Stahlwille and some Hazet (though not all in 3/8 drive) and as far as I can tell the KoKen are up there with the others.
I took the precaution of ordering spare inserts for these (KoKen are very good about supplying these - some makers (such as Stahlwille) won’t supply the inserts - but despite regular use I havn’t needed to replace any yet.
So, good fit, and very durable! If you have only ever used the Taiwanese bits, these are a step up! Reasonably priced too!
A couple of years ago I purchised Engineer TWM-08 pocket adjustable wrench from ebay. But today when I want to see whether I can uncover the handle, I found thet it is an ordinary 150mm wrench with cut handle. And also while according to information on Amazon, maximum jaw opening is 24mm, mine can open to 19mm only
Any recommendations for sockets and wrenches (regular combination) that are worth checking out?
I have two full sets of Koken ZEALs in 1/4 and 3/8, and a few super long KTC double box wrenches that I really love, looking to diversify a little though. Would like more "standard" sized stuff, i.e. not ultra short height like the ZEALs and regular/standard sized combination wrenches.
TONE or KTC maybe?
That's not an 08 that's an 06. The 08 has pointed jaws and a red handle. Open width is about right, spec lists 20mm. And yes its a chopped TWM-03. The TWM-08 is similarly just a cut down TWM-07.
Any recommendations for sockets and wrenches (regular combination) that are worth checking out?
I have two full sets of Koken ZEALs in 1/4 and 3/8, and a few super long KTC double box wrenches that I really love, looking to diversify a little though. Would like more "standard" sized stuff, i.e. not ultra short height like the ZEALs and regular/standard sized combination wrenches.
TONE or KTC maybe?
Any recommendations for sockets and wrenches (regular combination) that are worth checking out?
I have two full sets of Koken ZEALs in 1/4 and 3/8, and a few super long KTC double box wrenches that I really love, looking to diversify a little though. Would like more "standard" sized stuff, i.e. not ultra short height like the ZEALs and regular/standard sized combination wrenches.
TONE or KTC maybe?
That's not an 08 that's an 06. The 08 has pointed jaws and a red handle. Open width is about right, spec lists 20mm. And yes its a chopped TWM-03. The TWM-08 is similarly just a cut down TWM-07.
Okay, I lied about wanting more standard stuff, those Asahi Lightool wrenches piqued my interest.
Any experiences?
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Ko-ken 3305P and 3305PZ 14mm sparkplug sockets.
On some engines, the standard socket was giving me little to no room in the plug well, so I got the PZ version with the turned down shaft for better access to the sparkplug.
<a data-flickr-embed="true" href="https://www.flickr.com/photos/ccassan/46361969701/in/photostream/" title="Ko-ken 12pt, 14mm Magnetic Sparkplug Sockets"><img src="https://farm5.staticflickr.com/4817/46361969701_6c00d5aeab_b.jpg" width="964" height="1024" alt="Ko-ken 12pt, 14mm Magnetic Sparkplug Sockets"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
<a data-flickr-embed="true" href="https://www.flickr.com/photos/ccassan/32490281038/in/photostream/" title="Ko-ken 12pt Magnetic Sparkplug Sockets 3305P and 3305PZ"><img src="https://farm5.staticflickr.com/4810/32490281038_57c2a27100_b.jpg" width="1024" height="603" alt="Ko-ken 12pt Magnetic Sparkplug Sockets 3305P and 3305PZ"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Nicest spinner made ! Used mine a couple days back tearing down a P.O.S. Nissan 4cylReceived my Koken 3715SLK Spinning T-Handle 3/8” in this mornings mail!![]()
I wouldn't buy Tone because they are not entirely made in Japan (yes, thats what i'm looking for on the "Tools of Japan" thread). KTC - maybe but i will be sticking with Koken - Zeal and the regular line.
here you go - http://www.koken-tool.co.jp/catalog/en/html5.html#page=1
enjoy !


Bumping this up to say thank you! I looked all over on google to find out if any Koken sockets would work on a 14mm 12pt spark plug in a BMW (requires a thin wall socket). This was the only post I found, but it looks like the 3305PZ is the ticket!
Here are some thin 12-points:
Snap-On S9714MK with rubber insert
Schwaben magnetic
BurgerTuning.com magnetic
Ko-Ken makes an extended 14mm 6-point 3300C-180. Also, 3300C-250 that are 180 and 250 mm long respectively, and are magnetic.
I've never seen a 12 point sparkplug. Both my Ducati and BMW motorcycles use NGK 10 mm plugs with a 6 point 14 mm hex, and I would think that BMW car engines do also.
I've never seen a 12 point sparkplug. Both my Ducati and BMW motorcycles use NGK 10 mm plugs with a 6 point 14 mm hex, and I would think that BMW car engines do also.
Okay, I lied about wanting more standard stuff, those Asahi Lightool wrenches piqued my interest.
Any experiences?
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Pretty common actually
I haven't had anything to do with BMW cars since the Isetta. Spent 35 years working for Ford doing product development on both car and truck lines.

Well that would explain it...
BMW started using the "bi-hex" plugs back in '07, in their N54 twin turbos. Typical of BMW to go to a non-standard size but I'm sure the engineers back in the motherland had good reason
Of course Ford has their 9/16" size plugs...





.....Ko-Ken makes........an extended 14mm 6-point 3300C-180. Also, 3300C-250 that are 180 and 250 mm long respectively, and are magnetic.
I've never seen a 12 point sparkplug.
....maybe someone had already posted about this but....Nicest spinner made ! Used mine a couple days back tearing down a P.O.S. Nissan 4cyl
I used to use old school speeders but GOOD t handles are nicer.
That looks like it! Thanks for this. If you turn on closed captioning for that video, it's much more entertaining. Ko-Ken becomes "cocaine" and ratchet becomes "wretched."I´d say its Ko-Ken S.O.D.H. system
Anex screwdriver ratchet nº 397
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