DescriptionIf you've been looking for a cross spear head drill bit set, then your search is over! That's because our product can provide great help in drilling brick walls, wood, plastic, ceramic tiles, glass, vitrified tiles, granite, and etc.Features-Color: Black-Material: alloy -Size: 8.30X1.00X1.00cm/ 3.26X0.39X0.39in - Suitable for glass, ceramics, vitrified tiles, all-ceramic tiles, brick walls, wood, plastics- The rod of the drill bit is cut into a solid hexagon, which makes the electric drill grip more tightly and not easy to slip during drilling.- Four-blade design, low cutting resistance, precise and effortless drilling.- The surface of the drill body is processed by centerless grinding, so that the drilling chip can be removed more smoothly.- Preferred hard alloy steel materials, which are harder and more wear-resistant than ordinary drill bits. The incision resistance is small, and the punching is accurate and effortless
