Specification Brand : Vermont Gage BulletPoint : For holding 3/8" shank end mills. CompatibleMaterial : Alloy Steel ItemName : MT4-3/8" End Mill Holder, with Drawbar End ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : end-mill-holders Manufacturer : Meda - Superior Import Material : Steel PartNumber : 56644409756 ProductDescription : Made of alloy forged steel for long, durable service life. * Hardened to RC 56-60 and ground to ensure maximum accuracy. * Drawbar Threads: MT4 1/2"-13 * Holders are for double end mills. ProductSiteLaunchDate : 2011-09-07T07:00:00.000Z UnitCount : 1 UnspscCode : 27112803