Specification Brand : Aexit BulletPoint1 : Product Name : Center Drill Bit;Diameter : 3.15mm/ 0.124" BulletPoint2 : Shaft Diameter : 8mm/ 0.31";Total Length : 50mm/ 1.97" BulletPoint3 : Material : HSS;Color: Silver Tone BulletPoint4 : Weight : 26g BulletPoint5 : Package Content : 2 x Center Drill Bit ExternallyAssignedProductIdentifier1 : 0637881774630 ExternallyAssignedProductIdentifier2 : 637881774630 ItemDisplayWeight : 0.28 pounds ItemName : Aexit 2 Pcs Drill Bits 3.15mm Diameter Lathe Drilling Hole Tool HSS Center Countersink Drill Bits Drill Bits ItemTypeKeyword : countersink-bits Manufacturer : Aexit Material : High Speed Steel ModelNumber : modle NumberOfFlutes : 2 PartNumber : f190413ae022597 ProductDescription : Used to make a conical hole for a lathe center in order to make a starting point for a quality twist drill, designed to prevent the twist drill from walking. Used for producing center holds in components or work pieces with require machining between centers. ProductSiteLaunchDate : 2018-09-28T02:36:06.171Z SurfaceRecommendation : Alloy Steel UnitCount : 1 UnspscCode : 27111700