Trimmable Tiger Flap Discs, 4 1/2 in, 40 Grit, 7/8 in Arbor, 13,000 rpm

Features: This unique Tiger Disc design enables the operator to trim away the back of the disc, exposing more flap abrasive | The backing can be trimmed up to 3/8" from the original diameter, dramatically extending the life of the disc