Diablo, 4" 5/7 TPI carbide T-shank jig saw blade for composite decking. Diablo's carbide teeth jig saw blades deliver extreme durability and superior cutting life in composite decking materials. High-performance carbide teeth provide an unmatched up to 50 times longer cutting life versus standard jig saw blades. The optimized blade design and perma-shield non-stick coating reduces heat for fast and effortless melt-free cuts. T-shank design fits all combo and most U-shank cordless and corded jig saws.