Wide Applications: Remove valve spring quickly without removing the cylinder head. Valve Keeper Remover And Installer Kit For use on all motors with overhead valves, cars, motorcycles, marine, and aircraft engines. Function: Quickly removes and installs valve keepers on most overhead valve engines with valve stems from 4.5 to 7.5mm and 5/16" to 3/8". The new smaller size fits for new Chrysler New World Engine and for some Toyota four cylinders. Instructions: Push or tap tool with a hammer to remove valve keepers. Magnet in tool body captures keepers for quick removal and valve disassembly. To install keepers, load in retainer on the valve stem, then push or tap handle to install. Can be used on the car or bench. Superior Material: Made of high-quality aluminum alloy, anti-rust, and anti-corrosion， the valve tool will not bend nor the valve spring gets loosen. Ensures you a heavy-duty and long-lasting tool kit. Satisfaction Guarantee--100% satisfaction guarantee. Please feel free to contact us if you have any questions about our product. Remove valve spring quickly without removing the cylinder head. Valve Keeper Remover And Installer Kit For use on all motors with overhead valves, cars, motorcycles, marine, and aircraft engines.