Lisle 36050 Valve Keeper Remover and Installer Kit Quickly removes and installs valve keepers on most overhead valve engines with valve stems from 4.5 to 7.5mm and 5/16 inches to 3/8 inches Makes valve component disassembly and reassembly fast and easy. Magnet in tool body captures keepers for quick removal and valve disassembly. Can be used on the car or bench. New smaller size works on Toyota four cylinder and Chrysler New World Engine applications.