The finishing block sander has an ergonomic design for maximum comfort and quick-change hook and loop holding system. Abrasive film sanding sheets feature super sharp, fast cutting grain, durable plastic film backing that resists tearing and edge wear, and anti-clog coating to prevent particle build-up to provide superior finishing results. 4 times performance and life. Included are 8 sanding sheets ranging from extra fine sanding to extreme removal sanding. 3" x 5-1/4".