You just need to put the sanding bands on the nail drill heads, then put the nail drill heads on the electric nail grinding machine for removing nails and grinding dead skin, can be applied for natural nails as well as artificial nails. Features - Color: As shown. - Material: Tungsten steel and . - Size: 5.00X0.50X0.50cm/1.97X0.20X0.20inch. - Can help you do diversified jobs, such as , grinding, sharpening, sanding, polishing and so on. - A nice tool set for manicurist or beginner, nail salon, spa or personal manicure pedicure, etc. - These nail drill bits have good resistance to corrosion and rust, and the smooth surfaces allow you to clean them conveniently with nail brush. - Regular cleaning will protect the drill bit and prolong its life, also will keep you and your client’s nails healthy. - Suitable for natural nails and all gel nails, bring more conveniences. Package list: 11 x nail grinding