1-1/4", Carbide Plunge Cut Blade, For Oscillating Multi-Tool, Can Cut Both Metal & Wood, Carbide Tip Is Welded To A High Carbon Steel Body, Anti-Vibration Slots & Thicker Interface Bracket Reduces Vibration, Blade Is Tapered For Even More Vibration Control & More Efficient Debris Removal, Blades 1-1/4" Width Helps User Speed Through Long Cuts.