Weiler Tiger Angled coated angled flap disc uses ceramic as the abrasive material, is measured using outside diameter (OD), with the OD being 5 in, has a diameter of 5 in5 in and comes with a brush width of 5 in. Weiler incorporates this ceramic material into the angled flap disc forming a grit of 80. The angled flap disc has a length of 5 in. All abrasive products that rotate or spin, such as the ones in this category, have a maximum speed at which you can run them. This Weiler angled flap disc can be run at a maximum speed of 12000 RPMs. The Weiler angled flap disc uses phenolic for the backing plate