Genuine Makita 519529-0 Rotor Assembly for the DJR187 18V LXT cordless reciprocating saw. This replacement rotor forms part of the brushless motor assembly and is supplied with the associated components specified by Makita. Ideal for replacing a worn, damaged or faulty original rotor assembly. Makita parts documentation confirms 519529-0 as Rotor Ass'y for the DJR187.