1.2 Inch Quick Change Sanding Discs made with premium Aluminium Oxide abrasive grains featuring Active Grinding Aid which prevents loading and reduces heat buildup. 2.Quick change disc has unique safety torque screw, strong wear resistance and fast grinding force. 3.Aluminium Oxide corundum abrasive grain has high abrasion resistance and hardness, and the is attached with thermal and blocking resistant coating, which can improve the grinding efficiency and service life. 4.2 Inch Quick Change Sanding Discs can meet the requirement of 23000Max. Rpm. 5.Quick change disc Can Used for grinding welding seam and smoothing . Applied Range: 2 Inch Quick Change Sanding Discs Can grind high-quality metals, such as shipbuilding, car building, aviation, machinery and so on. All the abrasive cloth uses heavy cloth base, and attaches a high toughness cotton backing cloth on the back of the abrasive cloth, so that the abrasive dish is more elastic and suitable for plane and side grinding, and can also increase the plastic links on the back. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Colour:Photo Color Material:Aluminum Oxide Package Contents: 10x P36 Aluminium Oxide Quick Change Discs 10x P60 Aluminium Oxide Quick Change Discs 10x P80 Aluminium Oxide Quick Change Discs 10x P120 Aluminium Oxide Quick Change Discs 10x P240 Aluminium Oxide Quick Change Discs 1x Quick change Disc Pad Only the above package content, other products are not included. Note: Light reflection 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.