Diablo, 20 piece T-shank jig saw blade set for wood an metal. Set consists of (1) 4-5/8" 13 TPI Bi-Metal T-Shank Jig Saw Blades for Ultra Fine Finish Cuts in Wood, (2) 4" 10 TPI High Carbon Steel T-Shank Jig Saw Blades for Reverse Cuts in Wood, (3) 3-1/4" 20 TPI High Carbon Steel T-Shank Jig Saw Blades for Scroll Cuts in Wood, (3) 4" 6 TPI High Carbon Steel T-Shank Jig Saw Blades for Fast Cuts in Clean Wood, (3) 4" 10 TPI High Carbon Steel T-Shank Jig Saw Blades for Fine Finish Cuts in Wood, (2) 5-1/4" 5/10 TPI Bi-Metal T-Shank Jig Saw Blades for General Purpose Cuts, (2) 3-5/8" 17/24 TPI High Speed Steel T-Shank Jig Saw Blades for Medium Metal, (2) 3-5/8" 17/14 TPI High Speed Steel T-Shank Jig Saw Blades for Thick Metal and (2) 3-5/8" 36 TPI High Speed Steel T-Shank Jig Saw Blades for Thin Metal. Diablo's jig saw blades are designed for superior performance and longer cutting life in wood, metal and plastics.