The MILWAUKEE Universal Fit OPEN-LOK 3-1/2 Titanium Enhanced Bi-Metal Blade 1 Pack is designed for Oscillating Multi-Tools. These multi-tool blades for metal are titanium enhanced and made from premium high-speed steel. The 3-1/2 bi-metal blade has 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. It uses a combination of tooth form and material to offer better cutting performance in soft metals. These bi-metal multi-tool blades are designed and made in the USA with global materials.