Specification Brand : Bison CutType : Taper ItemName : BT Flange Shell End Mill Holders (Bison Series 990) Taper 50 / 1-1/4" Dia. x .69" Proj. x 4" OAL ItemTypeKeyword : end-mill-holders Manufacturer : Bison Material : Steel PartNumber : 71925251827 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. * Shell End Mill Pilot T.I.R. * Through spindle coolant capability. ProductSiteLaunchDate : 2011-09-07T18:00:38.658Z SupplierDeclaredDgHzRegulation : unknown UnitCount : 1 UnspscCode : 27112803