The MILWAUKEE OPEN-LOK 1-3/8 HCS Wood 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. The MILWAUKEE HCS Wood blades feature more teeth and an increased 1-3/8 cutting width for a deeper plunge cut than previous generation wood blades. These blades feature a reinforced Universal Fit OPEN-LOK anchor for better strength & control and allow for 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.