This is a kind of quality drill bit, the reinforced alloyhead with high hardness, prevents bit cracking, help improving work efficiency. The triangular shank design makes the clamping more tight and does not slip. U-shaped spiral grooves design provides low resistance, resulting in smoother and faster drilling and easier chip removal. Smooth, accurate and easy drilling in ceramic tile, glass, brick wall, wood and so on. You can have a try. Features: Reinforced alloyhead with high hardness, prevents bit cracking, help improving work efficiency. The triangular shank design makes the clamping more tight and does not slip. U-shaped spiral grooves design provides low resistance, resulting in smoother and faster drilling and easier chip removal. Strong toughness and wear resistance, can be installed in the hand drill, electric drill, benchdrill. Smooth, accurate and easy drilling in ceramic tile, glass, brick wall, wood and so on. 4 specifications optional: 6mm, 8mm, 10mm, 12mm, you can
