These high-performance blades feature an ultra-hardened cutting edge to deliver up to 5X longer life than standard blades. Curve contact edge creates a pilot for precise, clean plunge cuts with less vibration. Includes: 1-1/4" universal fit bi-metal oscillating blade for nail-embedded wood, 1-1/4" universal fit bi-metal oscillating blade for clean wood, and 3-1/2" universal fit bi-metal oscillating blade for general purpose cuts.