The MILWAUKEE OPEN-LOK 3-1/2 HCS Wood Segmented Oscillating Multi-Tool Blades are made from premium high carbon steel with edge ground teeth for fast wood cutting. Designed for optimal cutting performance in wood, PVC, drywall, and other soft materials. These blades feature a Universal Fit OPEN-LOK anchor 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.