Bosch T118BF 5 pieces 3-5/8 In. 11-14 TPI Flexible for Metal T-Shank Jig Saw Blades For medium to thin metals 1/4 In. to 1/8 In. thick (ferrous and non-ferrous) 11-14 TPI progressive tooth design for smooth cuts in various thicknesses Bi-metal construction for durability and long life 3-5/8 In. overall length, 2-5/8 In. working length Proper lubricant is recommended when cutting metal Bosch's break resistant and durable in metal blade. Application: Cuts thin metals 1/8" -1/4" (ferrous and non-ferrous) Benefits: Makes straight cuts and has a long life. TPI: 11-14 Overall Length: 3-5/8"