Features and Benefits:�Optimized tooth design for speed and durability�Tough Neck™ ribs strengthen the blade tang and minimize breakage�Grid Iron™ honeycomb pattern increases blade rigidity to resist blade buckling�Grid Iron™ honeycomb pattern increases blade rigidity to resist blade buckling.�Optimized tooth design providing 2X more life than our previous generation SAWZALL® bladesTHE TORCH™ metal-cutting blades with the Double Duty Upgrade™ feature a tooth form optimized for the longest life and maximum durability. Tough Neck™ is engineered to protect against tang breakage and delivers the strongest SAWZALL® blade tang on the market. Grid Iron™ features a stamped honeycomb pattern throughout the body of the blade that greatly increases the rigidity of the blade, making it the stiffest metal cutting SAWZALL® blade on the market. These blades are ideal for making tough, straight cuts. Bullets: optimized tooth design providing 2X more life than our previous generation SAWZALL® blades; Tough Neck™ ribs strengthen the blade tang and minimize breakage; Grid Iron™ honeycomb pattern increases blade rigidity to resist blade buckling.