Up to 50 percent longer service life, patented tooth shapes for optimised material removal and efficient cutting performance with increased service life (average performance dewalt saw blades compared to previous dewalt range) Aggressive tooth geometry, for fast cuts in different materials such as wood, wood with nails or metal Durable blade design, bi-metal construction for increased wear resistance and stability Box contents, 1x 8-piece reciprocating saw blades set consisting of 4x dt2301-qz reciprocating saw blade bim demolition multi-material 10 tpi, 2x dt2349-qz reciprocating saw blade bim for wood 6 tpi, 2x dt2353-qz reciprocating saw blade bim for metal 14 tpi