Ideal for fine detail work, engraving, carving, touch-up and finishing on wood, jade, ceramic, glass, hardened steel, semi-precious stones and other hard materials. The 7144 Diamond Wheel Point features a 3/32 In. (2.4 mm) diameter and is coated in diamond particles for increased durability and greater material removal. The small tapered shape of the 7144 makes cuts in narrow and hard to reach places. Also makes flat or tapered side cuts while the tip makes V-bottom slots and grooves.