The rounded cone-shaped carbide drill bit is made of sintered carbide, an extremely durable raw material. This sharp drill bit is used whenremoving any type of compound and trimming nails. The drill bits have a universal shank diameter of 2.35 mm and are therefore suitablefor ""twist and lock"" and podiatry nail drill machines. They can be disinfected in aqueoussolutions and sterilised in the autoclave. The colour of the stripe(s) on the shank indicatesthe grit or sharpness of the drill bit. PRODUCT FEATURES: Shape: rounded cone Use: for gel, acrylic-gel and acrylic masses Head diameter: 7 mm . Head length: 14 mm . Level of sharpness: medium-coarse Recommended speed: 15 000 - 20 000 RPM* For whom? Right- and left-handed users