The Dewalt DT99551 set of sawblades are suited to cutting metal and wood with Xtreme Runtime (XR) quality performance. The metal cutting blades give 2 x the amount of cuts when used with the 54V FlexVolt recip saw making them long lasting and affordable. The set contains 4/6 TPI and 14/18 TPI blades. The 4/6 TPI saw blades come in lengths of 6" and 9" for wood with metal cutting and the 14/18 TPI saw blades come in 6" and 8" for metal cutting. The blades have a ToughCoat which reduces friction and improves cutting performance. Suited to cutting woods, particle boards, metals, piping, plastics and PVC. They come with a ToughCase for storage.