The DEWALT FlexVolt XR Metal Reciprocating Blades are coated in a special Toughcoat finish which reduces the build up of heat thus improving cutting performance and speed up to twice as much as market competitors. They have been optimised to deliver the best cutting performance in metal rebar and similar metals. Designed to be used in conjunction with the FlexVolt 54 Volt Reciprocating Saw. The DEWALT DT99552 FlexVolt XR Metal Reciprocating Blades have the following specification: Length: 152mm.TPI: 14/18.Pack Size: 5.