Feature Fitment -- Fits for Most Overhead Valve Engines With Valve Stems From 4.5 to 7.5mm and 5/16" to 3/8".New smaller size Fits for Toyota four cylinder and for Chrysler New World Engine applications. Works on automobiles, motorcycles, and boats. Function -- Used to removes and installs Valve Keepers On the above model quickly and smoothly and without disassembling the cylinder head. Usage -- The disassembly of the valve keepers: push or tap the tool with a hammer. The installation of valve keepers: load in retainer on valve stem, then push or tap handle to install. Can be used in a car or on a bench. .

Feature Fitment -- Fits for Most Overhead Valve Engines With Valve Stems From 4.5 to 7.5mm and 5/16" to 3/8".New smaller size Fits for Toyota four cylinder and for Chrysler New World Engine applications. Works on automobiles, motorcycles, and boats. Function -- Used to removes and installs Valve Keepers On the above model quickly and smoothly and without disassembling the cylinder head. Usage -- The disassembly of the valve keepers: push or tap the tool with a hammer. The installation of valve keepers: load in retainer on valve stem, then push or tap handle to install. Can be used in a car or on a bench. .