These Milwaukee Universal Fit Open-Lok 1-3/8" Titanium Enhanced Carbide Teeth Blades for Oscillating Multi-Tools (49-25-1505) are designed for extreme metal cutting in screws, bolts, metal pipe, nails, and more. They last up to 50X longer than standard bi-metal blades and can be used in a wide range of materials for the longest blade life. These Milwaukee carbide teeth blades are designed and made in the USA with global materials.