Feature: 1. USE WITH VARIOUS MANUAL AND POWER TOOLS: Micro twist drill bits can be used with various manual and power tools for a better experience 2. FOR VARIOUS TOOL FIXING SYSTEMS: These straight shank mini drill bits can be used in various tool fixing systems, and there are 9 different specifications in total 3. DURABLE AND OF SHARPNESS: Miniature twist drill is made of high speed steel, durable and of sharpness, possess low drilling resistance and smooth chip removal 4. FOR DIY CRAFTS OR REPAIR WORK: Very suitable for all kinds of jewelry DIY crafts and watchmaking, and also very suitable for carpentry, home furnishing, wood or plastic products, electronic parts repair work, etc. 5. GOOD STRENGTH AND TOUGHNESS: High speed steel material have high hardness, good strength and toughness, also stable quality Specification: Item Type: Micro Twist Drill Bits Material: High speed steel Uses: Suitable for jewelry, watches, PCB crafts Color: Silver Mini Twist Drill Bit Specifications: Approx. 0.5mm / 0.019in(5pcs) 0.6mm / 0.024in(5pcs) 1.0mm / 0.04in(3pcs) 1.2mm / 0.05in(2pcs) 1.5mm / 0.06in(2pcs) 1.8mm / 0.07in(2pcs) 2.0mm / 0.08in(2pcs) 2.35mm / 0.09in(2pcs) 3.0mm / 0.12in(2pcs). Package List: 25 x Micro Twist Drill Bits