HARFINGTON Diamond Grinding Bit 1.35mm Cylinder Head 2.35mm Shank 5mm Length (10pcs, 325-400 Grits) | For Ceramic, Glass, Stone, Metal & Nails

• Size - Grits: 325-400 Grits; Diameter: 1.35mm / 0.05"; Head Length: 5mm / 0.2"; Shank Diameter: 2.35mm / 3/32"; Shank Length: 40mm / 1.57"; Total Length: 45mm / 1.8"; The multi-purpose tool diamond drill bit set is packaged in a sturdy plastic box for your convenience to carry and store
• Material - 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 use
• Features - 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
• Applications - 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
• Wide Use - The grinding bit is also 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

• Select and Attach Bit — Choose the appropriate HARFINGTON diamond grinding bit for your task. Securely insert the 2.35mm shank into the collet of your compatible rotary tool, electronic grinder, or hand drill, ensuring it is firmly tightened.
• Set Optimal Speed — Set your rotary tool to the recommended operating speed of 30,000-50,000 RPM. Avoid using standard household drills, as their lower speeds (500-2,500 RPM) will not provide effective grinding and may damage the bit.
• Grind and Polish Safely — Apply light, steady pressure to the workpiece. Keep the tool stable to avoid excessive vibration. Wear appropriate eye protection and ensure good ventilation. Work in controlled passes for best results on materials like ceramic, glass, metal, or stone.

Typical situations where HARFINGTON Diamond Grinding Bit 1.35mm Cylinder Head 2.35mm Shank 5mm Length (10pcs helps — illustrative scenarios, not customer reviews.