Specification Brand : Value Collection BulletPoint1 : Fill Material Brass BulletPoint2 : NonPiloted BulletPoint3 : NonFlared BulletPoint4 : Maximum RPM 20000 BulletPoint5 : Shank Diameter (Inch) 1/4 CompatibleMaterial : Alloy Steel ExternallyAssignedProductIdentifier1 : 0707326006555 ExternallyAssignedProductIdentifier2 : 707326006555 ItemName : Value Collection - 1/2" Diam Solid Fill End Brush - Medium Grade, 1/4" Shank Diam, 20,000 Max RPM (4 Pack) ItemPackageQuantity : 4 ItemTypeKeyword : abrasive-cup-brushes Manufacturer : Value Collection Material : Nylon NumberOfItems : 4 NumberOfPieces : 4 PartNumber : 74038217 ProductDescription : Brass is softer than steel and stainless steel and will not scratch harder surfaces. It will not generate sparks when brushing metallic surfaces and works best on copper and brass. ProductSiteLaunchDate : 2020-01-03T04:10:34.916Z UnitCount : 1