This micro drills set with high hardness and high wear resistance is a good choice for you. It can be applied to PCB, SMT, mould, hardware processing, electronic industry, etc. 10pcs micro engraving drill in a set.Features:Made from tungsten carbide(tungsten steel), high wear resistance, not easy to bend and break.Small chip removal resistance, smooth to remove chips and drill holes.Sharper cutting edge can reduce cutting force and improve drilling quality.Strictly symmetrical cutting edge can ensure high efficient working and avoid the deviation in drilling.Can be applied to PCB, SMT, mould, hardware processing, electronic industry, etc.Multiple sizes included in one set to meet different needs.Specifications:Material: Tungsten SteelItem Type: Type 1 / Type 2 (Optional)Type 1 Size: 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mmType 2 Size: 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mmHandle Diameter: 3.175mm (1/8")Overall Length: 3 8.1mm (1-1/2")Quantity: 10pcsPackage Size: 8.6 * 5.2 * 1.0cm / 3.4 * 2.0 * 0.4inPackage Weight: 35g / 1.23ozPackage List:10 * Micro Drill Bits1 * Storage Box