Carbide tipped hole saws for universal use, especially for hard materials. Features a hexagonal mounting shank and center drill, with a precision carrier tube tipped with special carbide cutting edges. High temperature brazed and diamond ground for precise cuts, with extra large chip spaces for fast chip removal. Center drill diameter is 6 mm. Suitable for wood, laminate, plastic-coated wood, plastics, lightweight boards, plasterboard, gypsum blocks, aerated concrete, Eternit, Heraklith boards, bricks, and masonry. Ideal for installation work such as socket outlets and distribution boxes.