Specification Brand : YDuupxe BulletPoint1 : [Durability] With a long lifespan drilling up to 5000 pcs under normal conditions, ensuring reliability for your projects BulletPoint2 : [Efficient Design] Large scraps discharge space and smooth reduce resistances during cutting, improving hole quality BulletPoint3 : [Quality Assurance] Strictly avoiding partial holes, these drill bits confirm results for your engraving and crafting needs BulletPoint4 : [Acute Cutting Edge] Fine grinding process results in bits that reduce cutting force and prevent breakage, enhancing hole wall quality BulletPoint5 : [Materials] Ensures precise cutting with 10pcs carbide micro drill bits ranging from 0.3mm to 1.2mm ItemName : 10Pcs Set Pin Vise Hand Drill Carbide Micro Mini Twist Drill Bits 0.3-1.2mm PCB Print Circuit Board Tungsten Carbide Engraving ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 10 centimeters ItemPackageDimensions_Width : 6 centimeters ItemTypeKeyword : pin-vises Manufacturer : YDuupxe ModelName : Yduupxes95oi0z8hf ModelNumber : YDuupxes95oi0z8hf NumberOfItems : 1 PartNumber : YDuupxes95oi0z8hf ProductDescription : Spec: Features: - 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 resistances and smoothly during the scraps discharge - Use materials and fine grinding process makes bit more acute cutting edge, reduce cutting force and broken drill, improve the quality of hole wall. - The cutting edges strictly avoid partial hole, confirm 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!