. CUTTING HOLE FOR CONCRETE BRICKS BLOCK 80mm SDS PLUSBLACK-21101Designed for cutting holes in building materials such as concrete, bricks, blocks, gypsum and gypsum cement board. Ideal for cutting holes for utility boxes, sockets, ventilation pipes, sanitary pipes, plumbing pipes, drain distribution, branch and contact boxes etcDedicated for use in materials such as concrete, bricks, blocks, gypsum and gypsum cement board.8 carbides in the crown at a rake angle of 0 ° allows much higher speeds to be used for operation. This also increases the life and efficiency of the hole saw. The centering drill bit is also equipped with carbide.. Technical parameters:Crown diameter: 80mmSDS+ adapter: 85mmCentering bit diameter: 7mmCentering bit length: 110mmNumber of carbides: 8 + 1