MK Diamond 159107PK20 MK-99TWD is a 20-pack of 7” Turbo Wet/Dry Cutting Diamond Blades for Concrete and Brick, DM to 5/8-Inch Arbor. The continuous Rim is designed for Faster Cutting with Minimal Chipping, Cutting Brick, Block, Paver, Concrete, Tile, Roof Tile, Stucco and Cement Siding.