Specification Brand : Vermont Gage BulletPoint : For holding 1" shank end mills. CompatibleMaterial : Alloy Steel ItemName : MT4-1" End Mill Holder, with Drawbar End ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : end-mill-holders Manufacturer : Meda - Superior Import Material : Alloy Steel NumberOfFlutes : 1 PartNumber : 56644909756 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 single end mills. ProductSiteLaunchDate : 2012-08-06T18:57:29.780Z UnitCount : 1 UnspscCode : 27112803