Lots of great info in those resources that you posted. It seems that some of the differences between the different heads was (if I'm understanding correctly) 1 multiple standards of bit shanks requiring different heads (square head, morse taper head, square taper head, etc...) and also 2 the...
Yep, I have a bunch of stuff from the ITCL (mostly woodworking hand tool stuff, Stanley, Millers Falls, Ohio Tool Co, etc....) and had noticed that the site is currently unavailable which is a bummer.
Thanks for the info!
I recently purchased (haven't received it yet) a Keystone ratchet drill. I'd never seen or heard of one, so when I saw one for $5, I thought "I've got to have that!" There's not much info on the 'Net about these. So far this has been the most information rich location that I've been able to...