10Pcs/Set Micro Mini Twist Drill Bit Set PCB Printing Tungsten Carbide Board EngravingFeatures:1. .2. The drill has large discharge space, small resistance, and smoothly when dumping scrap.3. Use high-quality materials and grinding process makes the cutting edge a little sharper, reduce the cutting force and broken drill bits, improve the quality of the wall hole.4. Cutting edges strictly avoid partial hole, confirm the quality.5. Long service life, can drill 2000-5000pcs under normal working conditions, also can return to grinding 4-5 times. Specification: Material: Tungsten Carbide Steel Drilling Diameter: 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm Shank Diameter: 1/8in (3.175mm) Package Included: 10x0.3-1.2mm Drill Bit Note: Because different production batches, the color of the product will be random, hope you can understand. Thanks! 1) we accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow.2) payment must be made within 3 days of placing the order.3) if you are unable to check out immediately after the listing ends, please wait a few minutes and try again, payments must be completed within 3 days. About Shipping1.