Tip spiral flute tungsten carbide drill with shaper , reduce cutting force and prevent drill broken, the drilling accuracyGreat for drilling PC Boards, Plastics, Fiberglass, Wood, Soft Metals, etcCarbide tipped drill with high hardness, high wear resistance, high strength, resistance to bending, anti-impairment and long tool life.100% quality tip spiral flute carbide drill and new. long-lasting are made from high quality tungsten steel for a precise, easy experience.It is brand new with best qualitycolour: Random, do not accept the specified colorMaterial: Metal diameter (SD): 3.175mm 10 pc diameter (): 0.3-1.2mm (Size Include: 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2mm) length: 38mm : 10PCS Note: These are good quality too , specially for size of 0.3mm 0.4mm 0.5mm, it is very fragile for handling, so please be careful and take good control of your speed.Package Included: 10 X 0.3mm-1.2mm PCB Print Circuit Board Tip Spiral Flute Carbide -Drill Only the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.