Imperial Blades Starlock 1-3/8 In. Carbide Extreme Storm Titanium Metal Blade is an extreme metal-cutting oscillating blade composed of heavy-duty bi-metal (BiM) combined with Storm Titanium coating for the longest life and best performance. The Carbide Extreme blade utilizes the carbide embedded teeth to tackle the toughest applications and last up to 30X more cuts than standard Imperial bi-metal blades. Recommended applications are: Thick Metal, Bolts, Screws, Copper Pipe, Wood & Nails and more. Popular projects include deck maintenance, framing, hard material flooring, automotive or plumbing applications and porous stonework. Compatible with Starlock multi-tools: Bosch and Fein. Also fits non-Starlock multi-tools: Milwaukee, Ridgid, Makita, Rockwell and more.