[High Quality] Masonry drill made of high quality tungsten carbide, with reinforced head, high hardness, not easy to break and bend, surface treatment to prevent rust, long service life [Lance drill head] Sharp lance edges ensure high drilling speed even in hard materials, are 85% faster than standard bits, U-shaped groove ensures good chip removal [Lance drill head] Sharp lance edges ensure high drilling speed even in hard materials, are 85% faster Compared to standard bits, the U-shaped groove ensures better chip removal. [Triangular shaft] The triangular shaft design helps the electric hand drill to hold the drill firmly and prevent slipping and wandering, suitable for most electric hand drills [4 sizes] Masonry drill with 4 different sizes: 4 x 6 mm, 2 x 8 mm, 2 x 10 mm, 2 x 12 mm, different sizes for different applications, perfect for different drilling tasks and precise high drilling speed [Applicable] Ideal for most interior construction materials, metal, glass, ceramic tile,