【Carbide Burr Set】: These carving bits are made from Tungsten Carbide Steel for long life , sturdy and durable. Shank Diameter: 1/8'' , Total Length:45-50mm, Cutting Diameter: 1/4''. 1/8'' shank fits most small rotary tools with three jaw chuck 【Double Cut Design】: The groove lines of these carbide rotary burr's head are crossed, which makes it more suitable for materials with relatively low density, such as wooden, plastic and aluminum. To maximize cutting and material removal efficiency and effectiveness 【Premium Material】: This carbide burr set is made of premium tungsten Carbide steel with long working life, extremely high hardness and good toughness, machining hardness reach to HRC70. The carbide burr set cut through extraneous material like a hot knife through butter 【Multi-Purpose】: 1/8” shank carbide rotary file fits dremel and most die grinders or rotary tools. Ideal for metal working, tool making, DIY woodworking, model engineering , house repair, groove processing, wood carving, engraving, polishing, touch-up and smooth finishing 【Quality Gurantee】: You will get 10 pcs rotary burrs set packaged into a durable clear case for safety storage and protection. Any problems, please get back to us, we will offer refund or replacement to make sure your full satisfaction and sincere apologies. Many thanks for your support!, Manufacturer: shengbenhao