Bosch T318B100 100-Piece 5-1/4 In. 14 TPI Basic for Metal T-Shank Jig Saw Blades 14 TPI tooth design for smooth, fast cuts High-speed steel construction for maximum life Extra-long 5-1/4 In. overall length, 4-1/4 In. working length Proper lubricant is recommended when cutting metal 100 piece pack offers maximum value