Bosch 25-Pack 3-3/4" 120 Grit Detail Sander Abrasive Triangles are designed to sand plywood, hardwoods, and softwoods. They are also designed for hard-to-reach areas and use hook and look attachment to the tool. The Bosch 3-1/2 inch 120-grit medium sandpaper is ideal for working in tight corners during the final stages of your sanding project. It attaches conveniently to a standard detail sanding pad. Made from premium Aluminum oxide. The Bosch offering in sanding and polishing addresses finish requirements for wood, metal, paint removal, and more. Whether the job calls for a belt sander, orbital sander, polisher, or new multi-tool, Bosch has the right fit for the finish.