Introducing the 20-Piece Drill Press Sanding Drum Kit by POWERTEC. This reusable sanding drum kit for drill press sanders helps you complete many of your workshop and woodworking projects to perfection and with precision. You can easily sand holes, contours, and irregular shapes while smoothing out deep rough edges and cuts with this kit. Packaged at an exceptional value, each component is designed for performance, strength and long-term durability. The abrasives have both coarse and fine grit sizes (80 and 120) for project flexibility. This allows you to grind, carve and polish your way to professional looking results. The set comes complete with 4 expanding drums that are 1/2", 1", 1", and 1-1/2" long and feature assorted diameter sizes (1/2", 3/4", 1" and 2") and, all but the 1/2" drum, possess 1/4" long steel shanks perfect for most rotary tools, including hand drills, spindle sanders and drill presses. The drums fit snugly and can be tightened or loosened with a simple twist of the nut on the spindle.