7pcs Drill Bit (3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm)
It has strong toughness and wear resistance.
Incision resistance are small, increase the opening speed, long service life.
Industrial grade of TIN Coated Carbide Point with 4 Cutting edges.
Can be installed in the hand drill, electric drill.
Suitable For Ceramics, granite, tiles, stone, wood, plastic,concrete wall to drilling hole.