Specification Brand : Bison ItemName : BT Flange End Mill Holders Taper 40 / 5/8" Dia. x 2.50" Proj. ItemTypeKeyword : end-mill-holders Manufacturer : Bison PartNumber : 72200422636 ProductDescription : * Produced according to AT3 specifications. * Made of alloy forged steel for long, durable service life. * Hardened to RC 52-56 and ground to ensure maximum accuracy. * End Mill Socket T.I.R. * Through spindle coolant capability. ProductSiteLaunchDate : 2011-09-07T18:09:29.217Z UnspscCode : 27112803