Notpolish 5 in 1 Straight Cut bit is a red coated carbide designed for cleaning, prepping, shaping and shortening the nails. Helps remove gel, dip, and acrylic! This will be your go-to drill bit due to it being gentle for your clients' natural nails and acrylic nails! Recommended to not let them soak in acetone or barbicide longer than 10 minutes. Any time longer than suggested will result the Bit to discolor the red coat.