Features: - 100% Brand New and High Quality - 10pcs carbide micro drill 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm - Drill has a large scraps discharge space, little resistance and smoothly during the scraps discharge - Use high quality materials and fine grinding process makes bit more sharp cutting edge, reduce cutting force and broken drill, improve the quality of hole wall. - The cutting edges strictly avoid partial hole, ensure the quality. - Long life, it can drill 2000-5000 pcs under normal working conditions, also can return grinding 4-5 times - Shank diameter: approx. 1/8" (3.175mm) - Color: Because different production batches, product color will be random, hope you can understand. Thanks!