Diablo StickFast 4-1/2 x 4-1/2-In. 60-Grit Palm Sander Sanding Sheets, 4-Pack are for heavy-duty sanding tasks such as extra heavy stock or paint removal and leveling. These sanding sheets are crafted from a premium aluminum oxide grain blend, ensuring fast material removal and extended sanding life. They incorporate Clog-SHIELD technology, which reduces pitch build-up and clogging by using a special blend of grinding agents. The industrial-grade Pressure Sensitive Adhesive (PSA) backing, known as StickFast, s a strong and secure bond to your palm sander, making your sanding process efficient and hassle-. Model Number: DCS045060P04G