Drill to metals 10 pieces carbide of tungsten 4 sizes 6/8/10/12mm Head multi-grinding for materials during Rod triangular

[High quality] Made of carbide of tungsten high-quality, with a head reinforced, a hardness high, not easy to broken and to bend, processing rust-resistant of surface, long service life

[Head of trepan multi-grinding] The aretes living multi-meules offer a speed of drilling high same in the materials during, are 85% more fast that the bits standard, the groove in shape of U allows a good removal of the chips

[Rod triangular] The design triangular of the rod helps the drill electric to hand to tighten the drill, to prevent of slip and of errer, suitable for the most of drills electric to hand

[4 sizes] Drill to masonry of 4 sizes different, 4 x 6 mm (1/4 "), 2 x 8 mm (5/16"), 2 x 10 mm (3/8 "), 2 x 12 mm (1/2" ), different sizes for different uses

[Applicable] Ideal for the most of materials in the work arrangement indoor, the metal, the glass, the tiles of ceramic, the wood, the ceramic, the stone, the concrete, the briques, etc. (When of the forage of materials during, please use of water for the lubrication)