Diablo Carbide Teeth Jig Saw Blade, 3 1/8 inches (80 mm) in length and Teeth Per Inch (TPI): 18. This blade is designed for durability and precision, making it ideal for cutting medium-thickness metal materials (1/16" to 1/8" (1.6 mm to 3.2 mm). The Carbide teeth for 50x longer life, and a T-Shank (fits most jig saws).