Excellent sanding performance for professional use. Use dust extraction for better finish and improved health. Velcro fitting provides smoother sanding, perfect for use with random orbit sanders. Application: sanding, wood, metal, decorating, confined areas, detail sanding features: extra hard wearing aluminum oxide and velcro backed disc, with 8 holes for dust extraction. Pack of 10. Hole: 8 compatible with: bo5012 bo5010 bo5021: bosch b & d dewalt aeg milwaukee metabo festool material: wood, regular steel.