1、Easy to use: Size is about 13 x 8mm / 0.51 x 0.31in, easy to install and disassemble, very convenient to use. 2、Widely Used: Nail polisher can meet the needs of different nail art and many applicable scenes, with high strength, high efficiency and good effect. 3、Sturdy and Durable: Sand surface is used to polish the uneven surface of the nail, with a long service life, safe and reliable. 4、Multifunctional: Suitable for processing nails, glass, plastic, metal, stone, ceramic tiles, etc. Convenient grinding and polishing, high efficiency and stable performance. 5、High Quality Sandpaper: Made of high quality materials, strong and durable, and perfect grinding effect. Use fine sand, sand that is not easy to fall, you can use it at will. 50 x Sanding Cap2 x Shaft Item Type: Nail Sanding Drill BitSand Cap size: Approx. 13 x 8mm / 0.51 x 0.31inSanding Shaft Size: Approx. 50 x 5mm / 1.97 x 0.2inCharacteristic: Designed for polishing and trimming nails to keep nails beautiful and tidy; sand surface is used to polish the uneven surface of nails, durable and easy to operate; using high quality fine sand, not easy to fall off, can feel free to use.