The 3M™ Hookit™ paper disc 763U combines a blend of ceramic and aluminum oxide abrasive grain and a heavy F-weight paper backing to make short work for tasks like defect repair on metals, prep for paint and orbital sanding. 3M™ Hookit™ attachment system makes tool attachment swift and simple. A blend of aluminum oxide and 3M™ ceramic abrasive grain provides the 3M™ Hookit™ paper disc 763U with its fast cut and exceptional durability. Perfect for moderate to heavy stock removal as well as finishing, ceramic abrasives are engineered to handle intense heat and stress applications. Ceramic/aluminum oxide blends surpass aluminum oxide alone in cut rate and durability and make an excellent choice for difficult grinding applications. Closed coat construction contributes to higher stock removal and longer life. It is great for final finishing and polishing on metal substrates, as well, because the dense concentration of mineral lays down a finer pattern. Available in grades of 60, 80, P100 and P120, 3M™ Hookit™ paper disc 763U is a premium product that is ideal for work on metal. With a resin bond that is tough and resilient, and paired with the F-weight paper backing, this disc is made to stand up to demanding applications. Hookit™ sanding discs conveniently attach to a 3M™ Hookit™ disc pad (sold separately), can be removed swiftly and easily and can be re-used again and again for the extent of the abrasive life. It couldn't be simpler to attach a disc, and it stays firmly seated. This disc tends to leave finer finishes than a flatter pressure sensitive backing, it is more flexible and it resists contamination by dust, dirt and debris unlike pressure sensitive adhesive backings. Hookit™ 7010363502, Closed Coat, Series: 763U, 5 in Diameter Disc, 60 Grit, Aluminum Oxide/Ceramic Abrasive, Paper Backing, F-Weight Backing Weight