The XH-AL is the latest OLFA extra-heavy duty 25mm snap-off utility knife designed to easily cut through difficult and tough materials. The durable and comfortable fiberglass/rubber handle allows professionals to retire their heavy, awkward cutting tool. The UltraSharp black snap-blades, made from high-quality carbon tool steel, are 25% sharper than OLFA silver snap-blades. The OLFA Auto-Lock is designed for maximum pull strength. Use for concrete retainer break-out and scrape-off.