Silicone bits are designed for work on the natural nail. They are softer and will not cut into the nail plate. They are great at removing the bits of cuticle on the nail plate that may be left behind from pushing cuticles back. Sanding bands are probably not the best choice for the natural nail. The barrel shape makes them hard to hold flat to the natural nail to avoid cutting into the nail with the edge. A lower rpm and lighter pressure are recommended on the natural nail to prevent removing of nail plate layers. Remember when using an electric file that proper angle, pressure, and speed are important to prevent nail damage. -- LaCinda Headings
Editor’s note: You may want to contact your drill manufacturer for education on proper drill use with the brand you use.