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I still have not been able to isolate a specific application (beyond guesses and speculation) where the square-shank bits perform some sort of function that the conventional hex-shank bit does not. Comments so far indicate that it's a 'bit' of a mystery to other members as well. Web searching...

I'm surprised that no one has yet proposed the universal GJ cure-all for any gummed up mechanism--soak it in ATF. I've had a few vintage ratchets in my time (the permanently sealed type) that that were so gummed up as to be non-functional, that a soaking in lubricant fixed them right up. Judging...

THANKS MUCH! At least we know that they're still sold. I looked under the Apex Bits link on their site, but they're not listed there. Did a google search, but did not come up with the KCTool listing. When 'square drive' is included in the search, you get mostly all returns for sockets, ratchets...

Yes, that's one of the aviation-related references I alluded to in my OP regarding the description from the Apex site. The mrotools description appears to be derived from the Apex description (very common practice). However, these descriptions are broadly phrased to apply to the Apex fastener...

An interesting thought. However, my Dad never worked in manufacturing. All his tools were related in some way to service, maintainence and repair of military aircraft. The planes themselves were all manufactured by private corporations under contract. It would still be unclear why square-shank...

Interesting that there appears to be an aviation connection with the ones you found also. I can't imagine what the specialty use might have been. If Apex was a traditional supplier for aircraft fastener tools as they claim, perhaps plane mechanics bought them simply because those were the type...

Rummaging through my Dad's old small tools and found an Apex #830 socket bit holder for square profile bits along with a bunch of Phillips #2 bits and a few modified for slotted screws. The bits look very much like had impact driver bits, but instead of the normal 5/16" hex shank profile, these...

rick carpenter mentioned above that his local HD stocks the Husky ratcheting wrenches. My local HD did not stock them (at least the reversible ones) and I had to order them through the website. I had them delivered to the store so I could pick them up in paerson and double-check that the wrench...

The BMC locking pliers in the middle are interesting in that the jaw faces stay parallel when the pliers are locked down. If you can fix it up and get it working, it still has its uses today. I have one in the pliers bin and have used it on occasion (I have no problem keeping vintage collectible...

Maybe it might be useful for a table top band saw?

I've no doubt you will find them. The trouble might be the length. Moore Drop Forging (the contract mfr) probably had them special ordered--I doubt they determined the thichness of the ratchet head based solely on the length of available off-the-shelf screws of the time, but it is remotely...

Stanley would be a strong candidate as suggested by others. Stanley indeed made tang chisels for many decades, and so it would be natural that the same design philosophy for the base of the blade where it meets the handle might have likely been applied to this screwdriver.

Very good information, thanks for taking the time. Easy to see now what dstblj52 was explaining to me. Interestingly enough, these examples help illustrate my point as to how these brands make finding info about the lengths of the wrenches in a set more difficult instead of user-friendly. Take...

Understood. I guess the main theme of the thread was OP wanted to know whether the Husky ratcheting wrenches are the same quality as the Gearwrench. My additional comments in post #3 regarded my experiences in trying to find out the precise length of wrenches in the mentioned brand sets, and how...

Are you talking about the internal teeth in the gearing mechanism?

Where is that information published? I didn't see the Milwaukee I-beam design on the Infar website so you might try to see if they are the same wrenches. I couldn't find the tpi on the Milwaukee site either (looks like Infar is 72 tpi). Doesn't appear that Infar is mentioned on the Milwaukee...

This is just speculation on my part, but the flair at the base of the blade where it enters the handle looks remarkably like many kinds of tang chisels. It might be that a search for tang chisels with a plastic square profile handle might turn up a close enough geometry to iodentify the brand...

BTW, here's what Husky emailed me on the wrench lengths of their 13pc set: 8 mm 12-Point Reversible Ratcheting Metric Combination Wrench 5.5 in. 9 mm 12-Point Reversible Ratcheting Metric Combination Wrench 5.75 in. 10 mm 12-Point Reversible Ratcheting Metric Combination...

Good to know. Never heard of Infar before--looks like they make a Geartech brand that seems to be a knockoff of Gearwrench. My point is that, in reference to the Dewalt set, any company that refuses to publish the lengths of their wrenches, and whose customer service is incapable of providing...