This Lenox Reciprocating Blade Kit features the patented T2 Technology - meaning longer blade life and increased versatility. This technology reduces cutting forces on each tooth and optimizes chip removal to allow efficient cutting in the widest range of materials. This patented design also allows for ultimate durability and speed when cutting clean wood or nail-embedded wood bi-metal construction for durability and long life. This 13-piece pack cuts wood and wood with nails. Moreover, it also optimises tooth forms for wood cutting. Lenox Power Blast Technology increases blade life. It offers high speed blasting along the cutting edge strengthening the blade to reduce breaks and increase durability.