FEATURES:
Made of alloy forged steel for long, durable service life.
Hardened to RC 56-60 and ground to ensure maximum accuracy.
Shell end mill pilot T.I.R. < .0004".
Produced according to AT3 specifications.
Adapter Style: Tanged
Arbor Diameter: 1-1/2"
For Shell End Mills: 4 to 5"
Shank Type: 4MT