3M™ Stikit™ 363I P100 Grit Gold Aluminum Oxide Pressure Sensitive Adhesive Disc Roll measuring 6" Dia X NH is perfect for giving an excellent shelling and tear resistance to enhance the life and performance of the disc. Disc roll features an F weight paper backing with aluminum oxide as the abrasive material for more durability. Close coated disc roll rotating at a maximum speed of 10000 RPM is ideal for scratch refinement after coarse sanding and is sold as 4 per case each having 100 discs.