Merit Abrasives Metal Mini Flap Wheels with Mounted Steel Shanks Quality aluminum oxide abrasive for good rate and life. Semi-flexible cotton backing for good life and low price. Designed with the steel shank as an integral part of each wheel for balance and quick changes on air tools that have a collet design. Flap wheel design and flexibility of the material leaves a finer finish grit than other coated abrasive products. Pack of 1