Specification Brand : airgoesin BulletPoint1 : They work in both drills and in rotary tools and on a variety of surfaces BulletPoint2 : Shank diameter: 1/8" BulletPoint3 : Size: Bullet shape-- 4mm, 5mm, 6mm, 8mm and 10mm, Cylinder shape-- 4mm, 5mm, 6mm, 8mm and 10mm BulletPoint4 : 10 pieces each size and shape, total 100 pieces. BulletPoint5 : Material: cow leather ExternallyAssignedProductIdentifier : 6912011533252 ItemName : 100pcs Leather Polishing Burs Polishers Buffing Rotary Tool Shank 1/8 inch 3mm Cone Column ItemPackageQuantity : 1 ItemTypeKeyword : cutting-burrs Manufacturer : airgoesin PartNumber : 10KBPMT-100 ProductDescription : Description 100% brand new and high quality They work in both drills and in rotary tools and on a variety of surfaces Shaft diameter: 3mm, 1/8 inch Size: Bullet shape-- 4mm, 5mm, 6mm, 8mm and 10mm, Cylinder shape-- 4mm, 5mm, 6mm, 8mm and 10mm 10 pieces each size and shape, total 100 pieces. Material: cow leather Packing List 100 burs in a box as our pictures