Specification: Brand new Material: hard alloy (tungsten steel) Size: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm Shank diameter: approx. 1/8" (3.175mm) Color will be sent by random Quantity: 10pcs per set PCB drill with carbide (tungsten steel) material, with high hardness, high wear resistance, high strength, anti-bending,anti-breakage, etc.Package included: 10pcs x drill bits (packed with box)Note: Please allow 1-5mm errors due to manual measurement Item color displayed in photos may be showing slightly different on your computer monitor since monito.