1. The uniquely designed diamond sand surface makes the sanding discs easy to dissipate heat, reduce blockage, and the chip removal groove is cut, which makes the dust collection more powerful, and makes the working environment almost dust-free, which is beneficial to health. 2. This industrial grade blue sanding disc intermediate layer uses blend cloth, which is more tear resistant, durable and wear-resistant than ordinary paper base. the time to change the sanding disc frequently and make your work more efficient. 3. The super thick flocked hook and loop is used to tightly connect the sanding disc and the sander, which will not be separated from the sander, making the work . Compatible Devices: Random Track Sander, Die Grinder Compatible Material: Wood; Metal; Automobile; Stone; Glass; Wall; Ceramic Tile; Plastic; Construction Type: Coated Finish Type: Anodized Coating Diameter: 5inches Granularity: 80/120/180/240/320 grit colour: blue Material: aluminum oxide Package Contents: 50 x Sanding Disc 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.