Interesting stuff. I am always interested in the KTC line. I just ordered some stud removers. I will be expanding my purchases in the next few months to get some more KTC line items such as impact sockets. I would like to believe that the KTC line are as accurate as the Nepros line. Others think not, but I am not 100% convinced. I know Nepros have a great finish, but in terms of fit, I am thinking KTC will be right up there.
All I can say is that the Nepros production line is treated completely differently:
-it uses a different steel alloy: 5GQ
-lower batch production with more frequent tooling tolerance checks
-during production, the sockets/wrenches/etc are not tossed around like they typically are; they are treated like jewelry, each peice separated from each other so that they don't scratch against eachother during transport within their factory.
-greater care is placed in the heat treating process.
-they use a different vibratory machine and each product is carefully monitored by a trained eye; it's not simply thrown in the machine and stopped by some fixed duration.
-Although I'm not certain, I believe there are select operators (ie. forging machine operators) for the Nepros line. Many are veterans, who've been with the company for decades.
I'm sure I've missed other things, but that's what I can think of right now.
Bottom line is that Nepros items go through a painstaking process to ensure the most beautiful finish, with the closest tolerances, at the most compact dimensions without compromising durability.
What is the price differential between the KTC 3/8 Sockets and the Nepros? I have a full 3/8 Nepros set and a separate full 3/8 Nepros rail "set".
I think I bought my set from Japan in the high $20's - low $30 range back in early 2009. The same sized Nepros set is $34.95.
The item that I am most interested in with my latest order is the crowfoot set. I am keen to check out the quality, fit and applicability to what I am doing (rebuilding motors). Next up I will purchase full 1/2 and 1/4 Nepros sets.
I haven't seen the crowsfoot in person, but from what I've seen, I think it's the best looking ones ever made. They didn't spare anything in the details of making a crowsfoot, unlike all the other companies I've seen. For one, the ball detent is scalloped on all four sides--you don't see that very often, even with SO, I think?