The MILWAUKEE Universal Fit OPEN-LOK 9-Piece Oscillating Multi-Tool General Purpose Variety Pack offers users a versatile assortment of top-performing oscillating blades. The included Titanium Enhanced Carbide Teeth Blade is designed to last up to 50X longer in extreme metals compared to standard bi-metal blades. The Carbide Teeth are ideal for users cutting screws, bolts, metal pipe, nails, and more. The Titanium Enhanced Bi-Metal Blade uses premium high-speed steel and lasts up to 15X longer than standard high carbon steel (HCS) blades. The bi-metal blade is ideal for smooth cuts in wood & nails, PVC, and drywall. The MILWAUKEE NITRUS CARBIDE Extreme Materials Universal Fit OPEN-LOK Oscillating Multi-Tool Blades provide the ultimate cutting experience, delivering the fastest cutting and longest life on the jobsite. The extreme materials NITRUS CARBIDE multi-tool blade delivers 2X more cuts than Carbide Teeth blades.