5 Pieces 4 In.6 TPI Speed for Wood T-Shank Jig Saw Blades T144D Designed for straight and very fast cuts in wood, OSB and plywood 1/4 In. to 2-3/8 In. thick 6 TPI tooth profile and high carbon steel blade body for exceptionally fast cutting and long life in wood 4 In. overall length, 3 In. usable length 5 piece pack Specifications: T144D 5 Pieces 4 In.6 TPI Speed for Wood T-Shank Jig Saw Blades Type Speed for Wood Teeth Per Inch 5-6 Overall Length 4" Application Hard/soft woods, OSB, plywood 1/4" - 2-3/8" Type of Cut Straight and very fast cuts Quantity 5 Tooth Design Side set and ground Material High Carbon Steel Working Length 3" Blade Thickness 0.05" Blade Height 0.28"