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 So