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. Ice hardened blades are cryogenically treated for up to 50% longer life. These blades are ideal for making tough, straight cuts.