Brand new, never-used Lisle 24000 Ring Groove Cleaner, still in its original, sealed packaging. This is a “New Old Stock” item, meaning it is a vintage tool that has remained in its original packaging since it was manufactured in 1996. This professional-grade tool is essential for any automotive mechanic or engine builder. It is designed to quickly and efficiently remove stubborn carbon buildup from piston ring grooves. Cleaning the grooves is a critical step before installing new piston rings to ensure they seat properly and provide optimal compression and oil control.