Our S644DF cobalt bi-metal reciprocating saw blades feature 6 inch (152mm) length, 6TPI aggressive coarse teeth, and premium cobalt BIM construction, designed for fast, efficient cutting in wood, nail-embedded wood, lumber, pallets and demolition projects. Universal 1/2″ shank fits all major brands corded/cordless reciprocating saws, ideal for professional woodworkers, contractors, demolition teams and DIYers.