The MILWAUKEE OPEN-LOK 1-3/8 Carbide Teeth Metal Oscillating Multi-Tool Blades are designed for metal cutting in screws, bolts, nails, and more. Carbide Teeth blades last up to 50X longer than standard bi-metal blades and can be used in a wide range of materials while maintaining longer blade life. These blades feature a reinforced Universal Fit OPEN-LOK anchor for better strength & control and allow for quick blade changes across 100+ multi-tools. Not compatible with Starlock tools. MILWAUKEE oscillating multi-tool blades are designed and made in the USA with global materials.