MK Morse (1 pack of 5), Bi-Metal jig saw Blade. 3" Length x 3/8" Width x .035 Thickness - 18 Teeth Per Inch. For cutting ferrous and non-ferrous metals. Hard, durable high speed steel tooth point’s electron beam welded to a spring steel backer for toughness and stability during cutting. Applications include Machinable metal, Wood, Nail-embedded wood, Composites, Plastic, and Rubber. (SBO318)