[Package Contents] 225mm Sanding Disc, 50 pieces of round sanding disc, diameter 225mm/9inch, 8 pre-drilled holes for dust collection, 50 pieces in a box (P40/60/80/120/240 10 each) when used, you can choose sand of different grits according to your needs. 【Easy to Use】 The hook and loop sanding disc is easy and quick to apply, sturdy and durable, will not fall off during installation and use, and is easy to install and remove. The Ø 225 mm grinding wheel bar fits perfectly with the mounting plate, is easy to replace and can be used wet or dry. 【HIGH QUALITY】 The sanding disc is equipped with a thick D-grade paper base, a high-quality alumina sanding disc, made of abrasive aluminum and specially heat-treated for excellent polishing, sharpness and wear resistance. The durable, anti-static and high-strength resin bond system extends the service life. Excellent choice for sanding and polishing. 【Compatible】 225 mm sanding disc for long neck sander, drywall sander, telescopic sander,