According to the manufacturer, the OX-PU10 Superfast diamond blade slices through steel as effectively as it carves up stone, brick, and concrete. Cooling holes and a reinforced center flange allow it to make fast cuts through masonry and steel without overheating, the company says. It’s sold in sizes from 4 inches ($30) to 14 inches ($174) to fit angle grinders, circular saws, and gas handheld saws. OX Group USA, 908/603-0898,