Description: High hardness diamond coated HSS twist drill bit Diameter:0.8mm, 1mm, 1.2mm, 1.5mm, 2mm, 2.5mm Suitable for drilling Jewelry, ceramics, glass and semiconductor materials etc. Please add some water when drill a hole Material: Made of diamond, spiral technology, has both toughness and hardness, is not easy to break. The drill bit is sharp, and is easy for chip removal. Applicable machine: Widely used in rotary tool such as hand drills, drill press, flex shafts, bench drill and hanging mill. Application: Fit for drilling small holes on glass, metal, sea shells, jade, pearls, marbles, stones, drywalls and son on. Due to the different hardness of the material, the effect is also different. Package Include:According to your choose.
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