Martindale COMMX007 Commstone Saver 5/16" x 7/8" Non-conductive plastic

Uniquely shaped plastic handle with resurfacing stones at each end. Designed for smoothing commutators on small motors and generators. This non-conductive tool allows user access to resurface commutator to a smooth finish, which extends brush life and improves commutation. Provided standard with one polish and one finish stone.