Vintage Snap-on Tools Engineering document "Facts and Features of Snap-On Socket Wrenches".

Everything you wanted to know about sockets, and more ~ way more!

One of a kind item.

Authored by Snap-On Corp's engineering department.

Form No. ssx-163B

20 pages.

11 hand drawn figures.

2 hand drawn charts: torque vs axial tension and tensile stress, Snap-On Corp Engr Dept # 63-0-94.

Slight staining and soiling.  one small tear on the front cover.

See pictures.

Would make a great addition for any collector.

I was a young Mechanical Engineer when I acquired this document in the late 1970's.  I'm retired now, and time to let this document go to someone who will appreciate it.