【Tungsten Carbide Steel Rotary Burrs Set】: These carbide rotary burrs are made of high quality materials. Made of high quality tungsten carbide steel, sharp, sturdy and durable. Total length: 45-50mm, cutting diameter 1/4 inch, shank length 35mm, shank diameter 1/8 inch, compatible with most rotary tools and grinders. Matrix. 【DESIGN À 【DOUBLE CUT】: The groove lines of the head of this carbide rotary cutter are crossed. It is used on wood, iron, carbon steel, alloy steel, stainless steel, copper, aluminum and other metals, as well as marble, jade, bone, etc. Quickly creates transverse grooves and chips when grinding and carving. 【HIGH EFFICIENCY】 】: Efficiency Processing is difficult; Dozens of times higher than the manual file tool and nearly 10 times higher than the small grinding wheel with handle. Generally speaking, the router bit set can replace the small grinding wheel with handle. Easy to use cut, safe and durable. 【LONG LIFE】: Packed in a plastic case for safe storage and