Lenox Metal Cutting Jig Saw Blades Are Optimized For Metal Cutting Applications. Patented T2 Technology Provides Fast Efficient Cutting In A Range Of Metal Cutting Applications. High Speed Blasting Strengthens The Blade To Reduce Breaks And Increase Durability. Bi-Metal Technology Flexes To Resist Breaking And Helps To Extend Blade Life. 3 Pack; Size: 3-5/8 X 3/8 X .037 ; Tpi 18; Style: U-Shank; Cuts Medium Metal Between 1/16 To 1/4 ; Power Blast Technology Increases Durability; Patented T2 Technology Provides Fast; Efficient Cutting In A Range Of Metal Cutting Applications.; Long Blade Life Patented T2 Technology Provides Fast Efficient Cutting In A Range Of Metal Cutting Applications; Power Blast Technology Increases Durability* High Speed Blasting Strengthens The Blade To Reduce Breaks And Increase Durability; Shatter Resistant Bi-Metal Technology Flexes To Resist Breaking And Helps To Extend Blade Life. *Vs. Prior Generation Lenox Blades.;