? Flap Wheels: 1/4 Shank & 1/4-20 Shank ? 1/4 and 1/4-20 shank mounted flap wheels featuring quality aluminum oxide coated abrasive material. The flaps, arranged like a fan around the shaft of the tool, provide for consistent cutting action, maximum performance and long life. ? Applications: all ferrous and non-ferrous materials, stainless steel, iron, brass, aluminum, plastic, fiberglass, wood and glass. Excellent for working in small, difficult to reach places. ? 10 piece carton.