These discs are ideal for a wide range of applications focused primarily on material removal and are effective on a wide variety of substrates, including metals, composites, gelcoat, and whitewood. The film backing offers greater tear resistance than paper discs, for added durability and edge retention. For best results, pair with 3M Elite Random Orbital Sanders. The 3M Stikit System eliminates the time-consuming task of applying adhesive to the disc backing. These coated abrasive products come ready to use with a pressure-sensitive adhesive coating on the back so that attaching them to your disc pad is as simple as pressing on a sticker. And because the adhesive is pressure-sensitive, the disc can be peeled off the disc pad just as easily, leaving a clean surface for your next disc. A Stikit disc must be pressed onto a Stikit backing pad that is attached to a disc sander, random orbital sander, or stationary disc sander. Features. 3M Revolutionary Precision Shaped Grain Technology provides fast cutting and long life. Cuts up to 2x faster than conventional abrasives. Lasts up to 6x longer than conventional abrasives. Film backing for superior tear strength and edge retention. Ideal for a wide variety of substrates and applications primarily focused on stock removal. The Stikit accessory makes changing discs quick and easy. Convenient disc rolls eliminate the need to remove disc liners from individual discs. Specifications: Diameter 5 in. Grit 80. Size 5. Weight: 7.04 lbs