【TUNGSTENE CARBIDE STEEL ROTARY BURGER SET】: These carbide rotary burrs are made from premium tungsten carbide steel, offering a sharp, robust, and durable edge. Overall length: 45-50mm, Cutting diameter: 1/4", Shank length: 35mm, Shank diameter: 1/8", compatible with most rotary tools and die grinders. 【DOUBLE CUTTING DESIGN】: The flute lines on the head of this carbide rotary burr are crisscrossed. It can be used on wood, iron, carbon steel, alloy steel, stainless steel, copper, aluminum, and other metals, as well as marble, jade, bone, etc. Quickly guaranteeing cross grooves and chip removal during grinding and carving. 【HIGH WORK EFFICIENCY】: Processing efficiency is tens of times higher than a hand file and nearly ten times higher than a small grinding wheel with a handle. Generally, this set of rotary burrs can replace a small grinding wheel with a handle. Easy to cut, safe, and durable. 【LONG LIFESPAN】: Packaged in a plastic case for secure storage and protection. The service