Feature●【Durable】 Abrasive Grinding Disc are constructed of industrial grade premium blue zirconia cloth which has strength, durability and extended disc life.●【Wide Used】Our flap sanding discs is widely used for metal or wood, to remove the weld reinforcement, deburring, polishing, and to rust removal.●【Efficient Grinding】Glass fiber and adhesive form a firm combination. Grinding Discs will not pollute the working surface. The fiberglass pad can effectively absorb vibration and bring more stable and efficient grinding with low noise.●【Discs Size】40 Grit,Material: Zirconia,Max speed: 13000 rpm.Outer diameter: Approx. 125mm/ 5",Inner diameter: Approx. 22mm/ 0.87". All sanding flap wheels are manufactured on computer controlled machines and subject to numerous tests which ensure high quality and greater safety.●【Heavy Duty】This 40 grit Zirconia Abrasive Grinding Wheel is coarser in build and ideal for heavier stock removal and sanding. Grinding Disc is durable, good abrasion resistance, anti-static and anti-clogging. An excellent blend of zirconia and aluminum oxide grain which provides a very good cut rate to cost ratio.Description