Features: 36050 Valve Keeper Remover and Installer — Designed to easily and simply remove and install the valve keepers, can be used on most overhead valve engines with valve stems from 4.5 to 7.5mm and 5/16″ to 3/8″. 19700 Valve Holder — used when valve springs or valve stem seals are replaced, for use with a air compressor to help prevent the valve from falling into the combustion chamber. Fit for both 14mm and 18mm threads. HW0107 Valve Stem Seal Pliers — Used to remove valve stern seals on the overhead camshaft engines, fits for most cars in the market. .