The BikeService Piston Ring Compressor Kit is part of the latest quality workshop tool range from BikeService.BikeService is a trusted brand in the realm of motorcycle tools. Their comprehensive range of high-quality and professional-grade tools ensures efficient bike maintenance and repair. Get your bike in top shape with BikeService tools.Installs piston rings from 35mm~111mm (1-3/8"~4-3/8").Features: Pliers can be used parallel or perpendicular to the cylinder block Ratcheting handle holds the compressing rings in position for easy installation of piston rings. Manufacturer part number: BS3032 View all BikeService Tools. View all Maintenance tools and accessories.