US PRO Tools Engine Piston Ring Service Tool Set, 5589. A Service Set Containing Piston Ring Compressors With Self Locking Ratchet Which Prevents Premature Release And Gives A Positive Locking Action, Piston Ring Pliers For The Easy Release Of Piston Rings And A Piston Ring Cleaner Supplied With Three Cutters Covering Most Popular Piston Groove Sizes.
