The Hiltex 10100 Router Bit set comes with 15 pieces of extremely durable tungsten carbide bits. YG8 tungsten carbide is substantially harder than standard titanium, registering at a 9 on Mohs scale of mineral hardness. Material toughness also provides excellent resistance to heat. Variety of bits can be used to create circular cross-section holes with use of power drills at high torque levels. Use it to trim, edge, groove, manipulate, and shape wood for your carpentering projects. Set includes a collection of straight, cove box, v grooving, Roman Ogee, flush trim, panel pilot, 45-degree chamfer and corner round bits.