The Milwaukee 49-25-1573 NITRUS CARBIDE Extreme Materials Universal Fit OPEN-LOK Oscillating Multi-Tool Blades are engineered for high-performance cutting in the most demanding jobsite conditions. Featuring advanced Nitrus Carbide technology, these blades deliver up to 2X more cuts than standard carbide teeth blades and are designed for superior longevity when cutting through screw-embedded wood, nail-embedded wood, plaster, cement board, drywall, and PVC. The Universal Fit OPEN-LOK anchor is reinforced for added strength and control, allowing for quick and easy blade changes across most major brands of non-Starlock multi-tools. Each 1-3/8 inch blade features a 2 inch maximum plunge cut depth and is finished with a protective black oxide coating for enhanced corrosion resistance. Made in the USA with global materials, these blades include laser-etched markings for easy identification