Features and Benefits: * Cut thin sheet metal or tub, ferrous and non-ferrous metal and conduit * Fits all types of reciprocating saws * Universal 1/2" shank * One blade per package 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.