Description:[150 GRITS & 6" DISCS & 17 HOLES]Discs are 150-grit, extra sharp.17 holes ,6-inch flocking sandpaper dia,fit for any 17 hole 6 inch hook and loop orbital sander[GOOD SANDING EFFECT]Durable aluminum oxide abrasive offers faster cutting and stearate coating that resists clogging; premium resin bond system gives smooth finish[HOOK and LOOP BACKING]Hook and loop sandpaper backing makes grit changes quick and easy, and lengthens the life of the abrasive.The back of the sanding disc has the one side of the hook and loop and the orbital sander has the other half so it sticks to the sander.