Bosch T127D 5-Piece 4 In. 8 TPI Special for Aluminum T-Shank Jig Saw Blades Versatile blade for aluminum 3/16 In. to 5/8 In. thick, fiberglass 3/16 In. to 3/4 In. thick, and plastic 3/16 In. to 1-1/4 In. thick 8 TPI tooth design for fast, straight cuts HSS construction for long life Proper lubricant is recommended when cutting metal 4 In. overall length, 3 In. working length