3M™ Disc Kut-Down™ discs are used for a variety of collision repair jobs. They feature extremely coarse-grades down to 24 grit for effective grinding and include a built-in backing plate that provides durable support and easy adapter attachment. Disc Kut-Down™ means that as the discs wear, the edges can be trimmed and refreshed so you can keep your discs longer and minimize wasted material.