30 pieces of diamond burs: the assortment includes cone, cone, inverted cone, shaft, bud, cylinder and blade burs in different sizes, suitable for different purposes, more practical and useful (please click Please buy on the product page when purchasing to get a better price. )Coated with high-quality micro-diamond powder, used for grinding the inner hole of the mold, exquisite craftsmanship provides high-quality productsSuitable for the cooperation with electric grinding machines, engraving machines and other mobile machines In normal use, it can cut, grind and engrave various materials such as glass and jade. Mold repair, engraving, can be used for furniture, crafts, molds, music production, various model airplanes, ships, etc. Recommended for jewelers, gemstones, hobbies and crafts, modeling, home repair and more.< p>This set is used for grinding, cleaning, cutting, polishing and more.These bits are coated with hard diamond particles.They fit your hand drill, drill press, rotary tool and grinder.Suitable for processing wood, glass, plastic, metal, stone, tiles, ceramics and more.High working efficiency, good grinding effect and long service life.Basically replace the small grinding wheel with a handle, no dust pollution.Convenient grinding, easy to use, safe and reliable.Diamond file set:Tapered shape: ideal for cleaning narrow areas under nailsCone: another handy tool for nails or running along cuticlesDrums and buckets: for surface work, shortening and fillingReverse Filling Drill Bit: Ideal tool for cutting and removing nail tip product< /p> Specifications:Material: DiamondShank Diameter: 3mmOverall length: 45mm