Professional bi-metal reciprocating saw blades are designed for professional grade applications, Each blades consists of cobalt high speed steel teeth, electron beam welded to a alloy backbone, to provide flexibility and performance, 1/2"" universal shank fits all popular reciprocating saws, For fast plunge cutting in wood, nail embedded wood, plaster and aluminum, Heavy duty blade for demolition work, Universal 1/2"" shank fits all types of reciprocating saws, One blade per package, Size: 6T x 12"", SKU: ISN15116