10 Pack, 1-3/8", Long Life, E-Cut Blade, Multi Mount, With Special Bi-Metal Teeth, Product No Smoke & Cut Through Nails In Wood, Masonry, Etc., Stepped Shape For Sawing Flush To Surface, Can Be Simply Plunged Into The Material At Any Point, No Clearance Necessary Behind The Work Piece, Wood Teeth, Bi-Metal, For All Wooden Materials Up To 2", Also With Nails, Plasterboard, All Plastics & Fiberglass Reinforced Plastics, High Cutting Speed, Extremely Powerful With Extra Long Service Life, Ideal For All Crafts Including General Contracting, Flooring, Tie & Bathroom Renovations.