OPEN-LOK 1-3/8 in. Carbide Teeth Multi-Material Oscillating Blade 3-Pack, Universal Fit OPEN-LOK Anchor for Better Strength and Control, Carbide Teeth Last Up to 50X Longer Than Standard Bi-Metal Blades, Unique Aggressive Tooth Design for Optimal Cutting in Wood, Screws, Nails, Cement Board, Plaster, and More, Thin Kerf Design for Faster Cuts, Made in the USA with Global Materials.