Diablo, 10 piece T-shank jig saw blade set for wood and metal. Set consists of 4-5/8" 13 TPI Bi-Metal T-Shank Jig Saw Blades for Ultra Fine Finish Cuts in Wood, 4" 10 TPI High Carbon Steel T-Shank Jig Saw Blades for Reverse Cuts in Wood, (2) 3-1/4" 20 TPI High Carbon Steel T-Shank Jig Saw Blades for Scroll Cuts in Wood, 4" 6 TPI High Carbon Steel T-Shank Jig Saw Blades for Fast Cuts in Clean Wood, (2) 4" 10 TPI High Carbon Steel T-Shank Jig Saw Blades for Fine Finish Cuts in Wood, 5-1/4" 5/10 TPI Bi-Metal T-Shank Jig Saw Blades for General Purpose Cuts, 3-5/8" 17/24 TPI High Speed Steel T-Shank Jig Saw Blades for Medium Metal and 3-5/8" 17/14 TPI High Speed Steel T-Shank Jig Saw Blades for Thick Metal. Diablo's jig saw blades are designed for superior performance and longer cutting life in wood, metal and plastics.