"Choose your blade for cleaning, slotting and cutting of all types of metal and masonry. Wheels qty. 1, Max. RPM 15,280, Recommended Use Metal, masonry, Wheel Type Right angle, Wheel Diameter in. 4, Arbor Size in. 5/8, Wheel Thickness in. 1/16. Cut pipe, sheet metal and autobody panels, studs, angle iron and tubing Unique reinforced design for strength 1/16in. thin for quick, clean cutting 4in. blades for Black & Decker Hitachi, Jepson, Makita and Ryobi right angle grinders"