Engineered for aggressive cutting and smooth-running wheels, the 14 in. x 1/8 in. x 1 in. High-Speed Metal Cutting Wheels feature a highly concentrated aluminum oxide grain. The blades are backed by 2 full sheets of fiberglass for extreme durability at high speeds, up to 5, 500 rpm. The softer formulation makes for fast cutting. These wheels are ideal for ferrous metal. | DEWALT 14" x 1/8" Aluminum Oxide Abrasive Chop/Cut-Off Blade DWA8030X