Choose The Makita P-37552 Sanding Discs for excellent sanding performance  The Makita P-37552 is a Pack of 10, 150mm Diameter, Sanding Pads with a 400 Grit rating and 6 Holes for dust extraction. They give an excellent sanding performance for professional use. Use dust extractor for improved health. Velcro fitting provides smoother sanding, perfect for use with random orbit sanders. The grit size is determined by the number of holes per square inch required by a sieve designed to collect the grit. The smaller the number, the coarser the cut. Compatible with: Makita BO6030, BO6040, BO6050J: Bosch, B&D, DeWalt and Metabo. Features: 6 holes for dust extraction Material: Wood, Regular Steel, Painted Wood Application: Sanding wood, regular steel and floor sanding Extra hard wearing aluminium oxide and velcro backed disc Specification: Grit: 400 Pack Quantity: 10 Diameter: 150mm Velcro Backed: Yes Part Number: P-37552