MAGBIT 625.6416 MAG625 4-Inch Carbide Grit Hole Saw with 1-9/16-Inch Depth 1-3/8-Inch depth Use standard or SDS shank arbors Works in rotary and SDS hammer mode, works forward and reverse Drilling a hole through concrete block takes less than 7 seconds Cuts brick, concrete block, fiber cement siding & backer board, stucco, old plaster