The 3-1/2" Universal Fit OPEN-LOK Titanium Enhanced Bi-Metal Blades are designed for Oscillating Multi-Tools. These multi-tool blades for metal are titanium enhanced and made from premium high-speed steel. These bi-metal blades have a slightly narrower cutting width than most standard bi-metal blades and a slightly longer blade body, designed for cutting soft metals, wood, nails, PVC, and drywall. They feature a combination of tooth form and material to offer you a better cutting performance in soft metals. The MILWAUKEE bi-metal multi-tool blades for metal are designed and made in the USA with global materials.