Package includes: 8pcs 0.8 / 1.0 / 1.2 / 1.5 / 1.8 / 2.0 / 2.5 / 3.0mm diamond twist drill bits, each size per 1pcs. 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. Note: Add the coolant can increase work efficiency and extend service life. Material Diamond Type Drill Bit Set Size 0.8 / 1.0 / 1.2 / 1.5 / 1.8 / 2.
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