The DeWalt 589013-00 Genuine Reciprocating Plunger Shaft is an original replacement drive shaft for selected DeWalt cordless and mains jigsaws. It forms part of the reciprocating mechanism that transfers drive through the saw to produce the blade’s up-and-down cutting movement. Suitable for replacing a bent, worn, damaged or broken original shaft on compatible DC330, DCS331, DCS332, DW331 and DW333 jigsaws. DeWalt parts data identifies 589013-00 as the SHAFT, while established parts references also describe it as the reciprocating or plunger shaft.