The DEWALT FlexVolt XR Wood 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 wood cutting applications from light to heavy demolition work. The blades can tackle nail embeded wood in window frames, door frames, decking and more. Designed to be used in conjunction with the FlexVolt 54 Volt Reciprocating Saw. The DEWALT DT99554 FlexVolt XR Wood Reciprocating Blades have the following specification: Length: 152mm.TPI: 4/6.Pack Size: 5.