This WAS in the sixties!!! They had a few quality problems when
they tried to reduce their prices. He bought a "set" of tools - not
from "open stock" and it appears they were not the same stuff.
I'll relate a story I've told on usenet before.
I wuz a neophyte bike wrench doing a top end job on a Puch "twingle".
They had square head bolts. I had no square sockets to fit down in
between the cylinder head fins, so used a 10mm Snap-On combo wrench,
the open end, end-wise down into the fins on the square bolt head. I
put a Crescent adjustable wrench on the shank/handle of the SO
open-end wrench to provide twist leverage. Three bolts broke loose
easily. The fourth did not. I continued applying torque on the SO wrech
until the bolt finally gave. The wrench never broke, but the open-end
head twisted 45 degrees to the shank/handle. This was a borrowed set,
not my own. When I finally reassembled the head, I put excess torque
on the wrench equally over the four bolts and managed to twist the
open end wrench head back into line with the shank handle. I later
told the person I borrowed the set from what had happened and told him
if he could identify which wrench I twisted, I would buy him a new
one. He could not. That IS quality and Snap-On once had it.
I've snapped the fingers off 2 Craftsman open end wrenches. When I
worked as a Yamaha shop mechanic, but lived 100 miles from the closest
Sears, failure was not an option and is the reason I've never
considered Craftsman tools to be pro grade. I used S-K tools for many
years and never had a failure, but this is when you couuld buy an S-K
wrench or socket set for $15-25. They now cost as much as Snap-On
sets did back in the 60s, i.e. in the $100-150 range. I don't need
that kinda quality, anymore, but still will not buy junk.
nb