KDT1114 Features: -Use these pliers with any of the following bands to install pistons from 2-5/8” to 5-7/8” (67mm to 149mm) in diameter.-Self- locking ratchet allows you to compress rings in small increments.-Pliers can be used parallel or perpendicular to the cylinder block on most bands sizesEngine rebuilding requires the good piston ring compressors to easily reinstall new rings and pistons without damage. Use these ring compressor pliers with the KD ring compressor bands to easily compress and install new rings and pistons into the engine block regardless of the engine being in our out of the vehicle..-Piston Ring Compressor Pliers. Warranty: -Lifetime warranty does not cover abuse.