Dremel's line of Max Life high-performance accessories provides long-lasting performance and impressive durability. Built to give you longer lasting stronger performing versatile accessories. The Max Life 117HP Carving Bit is coated and engineered to last 4X longer than the standard non-coated Dremel 117 carving bit. For use with all Dremel high-speed rotary tools the 1/4" (6.4mm) high-speed cutter works well for detailed material removal in applications like shaping carving engraving hollowing precision cutting grooving slotting inlaying making tapered holes or freehand routing. The Ball Nose shape of the Carving bit can be used for deep removal or to hollow out material. Use the sides to cut flat areas or round edges. The tip makes round-bottom slots and grooves and can be used for rounded side cuts. Two bits are included per package.