Features and Benefits: T2 technology tooth design delivers up to twice the life and cuts heavy materials more easily Bi-metal construction allows blades to bend and flex without breaking Designed to minimize friction and heat build-up while cutting through the widest variety of metal materials Shatterproof shock resistant precision milled teeth Ground to precision sharpness for straight cuts and a smooth finish Lenox has extended our proprietary technology across the entire bi-metal reciprocating saw blade line. All metal wood and demolition cutting blades now have the revolutionary T2 blade design that delivers up to 100% longer blade life.