The SDS max-9 hollow drill crown is ideal for cutting deep holes when installing switch boxes. It is made from highly robust carbide with a fine grain, ensuring optimal wear resistance during drilling. Additionally, the number of asymmetrical carbide teeth on the drill is adjusted to its diameter, making it the right choice for drilling that requires quick progress with low noise operation. Its two-spiral U-shaped shank is well-suited for transporting drill cuttings and breakthrough drilling, while the one-piece design ensures optimal power transfer from the machine. The drill is intended for use in concrete, masonry, and aerated concrete. It is compatible with SDS max drills. The product is also available in a two-piece version. Diameter mm: 82, drill crown depth (L1) mm: 80, working length (L2) mm: 160, number of cutting edges: 8.