The 71915 3-Inch Quick Change Mini-Abrasive Backing Pad is used on most electric drills. Easy quick release roll lock feature for accessibility. Industries is one of America's longest operating family-owned metal working product companies. Founded in 1932, offers more than 5,000 products for the hardware, automotive, farm and ranch and do-it-yourself markets. 3-Inch (76.2-mm) quick change roll lock packing pad with 1/4-Inch (6.35-mm) shank. Claims for warranty must be made within 90 days of the date of purchase. Proof of purchase required. This warranty does not cover any product that has been subject to misuse, neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.