The 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.