SurfPrep Profoam H&L Medium features a durable foam backing and an aggressive 150-180 grit for effective sanding on woodworking projects. This abrasive pad measures 3" x 4" with a thickness of 1/2", designed with six holes to reduce loading and maintain optimal performance during use. Ideal for cabinet shops, millwork companies, and professional woodworkers requiring high-quality surface preparation before finishing or painting.