Backing: Buckle hook, easy and quick paste, and practical Wide range of applications: from coarse to fine 10 matte paper classification to meet almost all general polishing requirements Sand discs made of alumina abrasive, , anti-static. The larger the sand, the better the polishing effect. Suitable for use with random orbital . Hook and loop support, and pre-drilling 8 dust extraction, easy to use. For metal and non-metallic, wood, rubber, leather, plastic, stone, glass and other materials grinding, polishing and so on. Abrasive: Alumina Back to Technology: Hook and Loop Color: reddish brown Diameter: 5 inches Pre-drilled 8 holes Size: 125mm in diameter 8 pieces per sandpaper: 40/60/80/100/150/120/180/240/320/400, a total of 80 note:For electric drill should be added converter. Sandpaper needs to be affixed to the pasted disc for fixed disc sanding. Package Contents: 8 x 40 sanding disc 8 x 60 sandpaper disc 8 x 80 grit sand disc 8 x100 grit sand disc 8 x 120 grit sand disc 8 x 150 grit sand disc 8 x 180 grit sand disc 8 x 240 grit sand disc 8 x 320 grit sand disc 8 x 400 grit sand disc Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.