Klein Tools 31838 12-Inch, 14 TPI Bi-Metal Premium Reciprocating Saw Blade for Heavy Duty Metals 1/8-Inch and Above, 5-Pack 12-Inch long, 1-Inch wide, 0.042-Inch thick, 14 teeth per inch Heavy duty bi-metal blades offer greater rigidity for smooth, straight, accurate cuts Innovative tooth geometry and blade design for faster cutting, less vibration, and longer blade life 1/2-Inch universal shank to fit all popular reciprocating saw tools Main application: Heavy duty metals 1/8-Inch thick and above; Pack of 5 blades