Broach Set cuts keyways in 9 bore sizes.
Press Release Summary:

Original Press Release:
Versatile Keyway Broach Set Cuts Keyways In Favorite Size Bores
Greenfield, MA - A standard set of high speed steel broaches,
bushings and necessary shims designed for cutting 1/8", 3/16",
1/4" or 3/8" keyways in nine bore sizes from 1/2" to 1 1/2" is
now available from The duMont Corporation, Greenfield, MA.
The Minute Man No. 10 Set will handle a wide variety of keyway
cutting --- from an occasional keyway in maintenance or repair --- to limited or quantity production.
The broaches, available from stock, are push-type and can be used with any hand-operated arbor press, or any hydraulic press with adequate throat depth. Requires no special skill or set-up time.
Other keyway broach sets, also available from stock, contain smaller or larger broaches and bushings and extend the range of keyway sizes that can be cut from 1/16" to 3/4" keyways in bores from 1/4" to 3" bore diameter. Individual keyway broaches and bushings are also available, as are broaches for cutting square holes.