Notpolish's Safe Bit Barrel bit is a red coated carbide is designed to create less dust with little friction and heat. Perfect for smooth, shaping, bilevel and shortening nails. Great for removing gel, dip and acrylic! This universal drill bit is a must have in your collection due to it being gentle on the skin and natural nails. Recommended to not let the Bit soak in acetone or barbicide longer than 10 minutes. Any time longer than suggested will result the Bit to discolor the red coat.