The grinding bit is suitable for grinding and polishing nails, which can meet all needs of removing dead skin, shaping or removing gel art nails, which is suitable for natural nails and artificial nails, suitable for nail art beginners and professionals. This grinding bit is made of stainless steel, which has excellent heat and corrosion resistance, and is covered with a sharply diamond particle coating that will not fall off or deform due to repeated useThe diamond grinder drill bits come with a universal 2.35 mm (3/32 in) shank grinder drill bit for most drills, rotary tools or die grindersThe multi-purpose tool diamond drill bit set is packaged in a sturdy plastic box for your convenience to carry and store The round handle design of the rotary tool diamond grinding drill bit makes it suitable for most electronic grinders, engraving machines, hanging grinders and hand drills, which is very suitable for gemstone carving, molding repair, casting cleaning, rust removal and polishing, and DIY enthusiasts The diamond drill bit set is very suitable for home decoration and handicrafts. It is a good helper for polishing, grinding, drilling, cutting, engraving and other operations, which can be engraved on various materials, such as tiles, ceramics, marble, stone, ceramics, agate, and even hard metals such as iron and silver Please wear appropriate protective equipment when using to protect your eyes ; keep the workpiece and the grinding head stable during use to avoid excessive vibration and force; the operating speed is kept between 30000~50000RPM. Exceeding the maximum speed may cause the drill bit to jump, reduce the grinding effect, and even cause the rod to bend in severe cases HARFINGTON 200-230 Grits Diamond Grinding Bit 4mm Inverted Cone Head 2.35mm S... HARFINGTON 200-230 Grits Diamond Grinding Bit 2.1mm Oval Head 2.35mm Shank 8m... HARFINGTON 5pcs 325-400 Grits Diamond Grinding Bit 1.6mm Oval Head 2.35mm Sha... HARFINGTON 120-140 Grits Diamond Grinding Bit 2mm Ball Head 2.35mm Shank 2mm ... HARFINGTON 5pcs 100-120 Grits Diamond Grinding Bit 2.5mm Cylindrical Ball Hea... HARFINGTON 40pcs Diamond Grinding Bit Set Tapered Oval Cylindrical Ball Head ... Add to Cart Add to Cart Add to Cart Add to Cart Buying Options Buying Options Customer Reviews — — — 5.0 out of 5 stars 1 — — Price $6.39$6.39 $5.59$5.59 $7.94$7.94 $4.79$4.79 — no data — no data Grits 200-230 Grits 200-230 Grits 325-400 Grits 120-140 Grits 100-120 Grits ✓ Diameter 4mm 2.1mm 1.6mm 2mm 2.5mm 1/1.3/1.4/1.5/1.6/1.8/2/2.1/2.2/2.3/2.5/2.6/3/3.5mm Head Length 3mm 8mm 8mm 2mm 10mm ✓ Shape Inverted Cone Head Oval Head Oval Head Ball Head Cylindrical Ball Head Tapered Oval Cylindrical Ball Head