The Weiler 07766 Bobcat Drive Mandrel Securely Mounts 2" And 3"Diameter Bobcat Mini Flap Discs Without A Backing Pad Onto A Right Angle Die Grinder That Accepts A 14"Diameter Shank The Mandrels Onepiece Design Is Made Of Steel For Strength And Extended Tool Life And It Has A 14"Diameter Shank That Inserts Into A Grinders Chuckweiler Manufactures Precision Brushes Abrasives And Maintenance Products The Company Founded In 1898 In Germany And Headquartered In Cresco Pa Meets International Organization For Standardization (Iso) Standard 9001