This Starlok oscillating multi-tool accessory blade set has a maximum of 21000 OPM. The straight/round cutting blade cut metal and wood. There are five blades in a pack. It includes a plunge-cut carbide blade/two bi-metal blades of 1¼-inch width, a two inches width high-carbon steel scraper blade, and a 3½-inch diameter bi-metal segmented blade.