Lenox 20553 4" x 3/4" 18TPI Reciprocating Blade S418R (1 Pack)

T2 Technology. Lenox has extended our proprietary technology across the entire bi metal reciprocating saw blade line. All metal, wood and demolitions cutting blades now have the revolutionary T2 blade design that delivers up to 1005 longer blade life and 25% faster cutting versus the prior generation of Lenox reciprocating blades. The patent pending design minimizes friction and heat build-up while cutting through the widest variety of materials.