The DEWALT DT99551 FlexVolt XR Reciprocating Blade Set contains a selection of bi-metal blades, that are coated in a special Toughcoat finish. This reduces the build up of heat, improving cutting performance and speed up to twice as much as market competitors. Suitable for applications such as cutting woods, particle boards, metals, piping, plastics, PVCs and more. Contains the following: 3 x DT99554 FlexVolt Xtreme Runtime Wood Reciprocating Blades 152mm 4/6 TPI. 1 x DT99555 FlexVolt Xtreme Runtime Wood Reciprocating Blades 230mm 4/6 TPI. 3 x DT99553 FlexVolt Xtreme Runtime Metal Reciprocating Blades 152mm 14/18 TPI. 1 x DT99552 FlexVolt Xtreme Runtime Metal Reciprocating Blade 203mm 14/18 TPI. 1 x ToughCase Blade Carry Case.