HW4052 Diamond Drill Bit, Diameter 52mm, Length 400mm Diamond drill bit with a diameter of 52mm and a length of 400mm. Designed for drilling in hard materials such as concrete, reinforced concrete, stone, and brick. Diamond teeth are laser-bonded to the bit body, which increases its lifespan. The hexagonal bit holder makes it easier to attach. Features: Diamond teeth are laser-bonded to the bit body; Works with water as a coolant; Technical data: Bit diameter: 52mm; Bit length: 400mm; Mounting thread: 1 1/4"; DEDRA - a Polish company operating in the tool industry since 1991. Their goal is to provide customers with products with modern technological solutions, high quality, and at the same time affordable. They care about the needs of their customers, keeping in mind the comfort and convenience of work. They strive to popularize products proven in foreign markets in the Polish market, offering the best value for money. Dedra has become a recognizable and valued brand, among others, in the welding industry, as well as among DIY enthusiasts performing renovation work.