Milwaukee 4" 6TPI U-Shank Multi-Material Bi-Metal Jig Saw Blade (5 PK) is designed and manufactured for the professional user who demands durability and precision. These bi-metal blades a longer lifespan d to high speed steel or carbon blades, ensuring you get more cuts before . Carefully crafted with attention to the material used, tooth shape, and sharpness, these blades deliver clean and fast cuts across multiple materials. They are compatible with U-Shank style jig saws and come in a convenient pack of five individual blades to keep you well-equipped for your projects. Model Number: 48-42-2300