Flap discs and wheels are suitable for: * Grinding and finishing of welds * Deburring, rust removal and snagging * Suitable for most ferrous & non-ferrous materials * Excellent for surface finishing * Conical shape provides an excellent angle for contour and edge grinding. Best when used at a wider angle of 15 to 25 degrees. HIGH DENSITY = 50% more abrasive material than any other flap disc. 10 discs per box.