Diablo, 5 piece high carbon steel/high speed steel T-shank jig saw blade set for wood and metal. Set consists of 4" 6 TPI High Carbon Steel T-Shank Jig Saw Blades for Fast Wood Cuts, 4" 10 TPI High Carbon Steel T-Shank Jig Saw Blades for Fine Finish Cuts in Wood, 3-1/4" 20 TPI High Carbon Steel T-Shank Jig Saw Blades for Scroll Cuts in Wood, 4" 10 TPI High Carbon Steel T-Shank Jig Saw Blades for Reverse Cuts in Wood and 3-5/8" 17/24 TPI High Speed Steel T-Shank Jig Saw Blades for Medium Metal. Diablo's high carbon steel and high speed steel jig saw blades are designed for high-performance cutting in wood and metal applications. Each blade included within this set is optimized to deliver effortless, clean cuts in wood or metal. T-shank design fits all combo and most U-shank cordless and corded jig saws.