Bosch T118EF 5-Piece 3-5/8 In. 11-18 TPI Flexible for Metal T-Shank Jig Saw Blades For medium to thin metals 7/32 In. to 5/64 In. thick (ferrous and non-ferrous) 14-18 TPI progressive tooth design for smooth cuts in various thicknesses Bimetal 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 5/64" - 7/32" (ferrous and non-ferrous) Benefits: Makes straight cuts and has a long life. TPI: 18 Overall Length: 3-5/8"