Milwaukee® 8 mm X 22 mm X 7 mm Ball Bearing is designed for D. I. die grinders, grinders, seawalls, drill, rotary hammers, impact wrench, saws, drills, sawzall plus sawzall plus, 3" & 4" belt sanders, 4" belt sanders with vacuum bag, "D" handle hammer drills and electric drills/drivers, 3" & 5" straight grinder, two speed sawzall, two speed D.I sawzall, 7" heavy-duty polisher, 50 mm die grinders, 1/2" reversing drills, sanders and 9" sander.