With a long-lasting aluminum oxide blend, this Merit High Performance AO coarse grit threaded shank mini flap wheel gets to work with an excellent cut rate and aggressive performance when compared to conventional flap wheels. Flaps constructed of heavy cotton and polyester offer exceptional durability and resistance to wear while keeping the wheel conformable to various shapes. A 1/4-20-inch threaded steel shank lets you quickly change the wheel without special tools, and it keeps the wheel balanced for chatter-free finishes on your demanding stock-removal and deburring jobs.