Package Content: 225mm Sanding Disc, 50pcs Round Sanding Discs, 225mm Diameter, 8 Pre-drilled Holes for Dust Collection, 50pcs in a Box (P40/60/80/120/240pcs 10pcs Each) Durable for Grinding and Practical Use, You Can Choose Different Sand Grits According to Your Needs. 【Easy to Use】Hook and loop sanding disc, easy and quick to stick, sturdy and durable, it will not fall off once installed and used, easy to install and remove. Ø 225 mm sanding discs The sanding discs fit perfectly on the mounting plate, are easy to replace and can be used wet or dry. 【HIGH QUALITY】 The sanding disc is equipped with a thick D-grade paper base, high-quality aluminum oxide sanding disc, abrasive aluminum with special heat treatment, which provides excellent polishing, sharpness and wear resistance. Durable, anti-static and high-strength resin bond system for extended service life. Good choice for sanding and polishing. 【Compatible】 225 mm for long neck sander, drywall sander, telescopic sander,