The Milwaukee Universal Fit OPEN-LOK Oscillating Multi-Tool 1-3/8 in. HCS Wood Blade 4-Piece Blade is made from premium high carbon steel with edge ground teeth, providing users with optimal cutting performance in wood, PVC, drywall and other soft materials. This Milwaukee blade delivers faster cuts than the previous generation of high carbon steel blades with more teeth and an increased 1-3/8 in. cutting width with a deeper plunge cut. This wood cutting blade for multi-tools is designed with global materials. The Milwaukee FASTBACK Folding Utility Knife and Blades Set includes the FASTBACK Folding Utility Knife with Blade Storage and 50 Piece General Purpose Utility Blades. The FASTBACK Folding Utility Knife with Blade Storage features a press and flip mechanism for 1-handed opening. This press and flip open utility knife offers users tool-free blade changes for fast blade swaps with a metal extension over the button to prevent accidental blade removal. The FASTBACK Folding Utility Knife has onboard blade storage, allowing users to store 5 extra blades. The Milwaukee utility knife has a metal body that provides durability while a durable wire belt clip reduces pocket tearing. This folding knife with gut hook and wire stripper integration increases the knife's versatility. The Milwaukee utility knife blades last 5 x longer and are maximized for cutting performance and durability with common jobsite materials.