The MILWAUKEE Universal Fit OPEN-LOK 1-3/8 in. Titanium Enhanced Carbide Teeth Extreme Material Blade 2 Pack is designed for Oscillating Multi-Tools. It has a unique aggressive tooth design that offers users optimal cutting performance in wood, screws, metal pipe, nails, cement board, plaster, and more. The 1-3/8 in. Titanium Enhanced Carbide Teeth Extreme Material Blade lasts up to 50X longer than standard bi-metal blades and can be used in a wide range of materials for the longest blade life. The unique, aggressive carbide tooth design offers faster cuts and better cutting performance in wood when compared to standard carbide blades. These Milwaukee multi-tool blades are designed with global materials.