QuestCraft Engine Overhead Cam Valve Spring Compressor Removal Tool OHV/OHC/CHV Auto Motors Heavy Duty Overhead Valve Spring Compressor. Ideal for removing valve springs, spring retainers Cam action level design for secure valve spring locking into the tool Allow valve springs and valve stem oil seals to be replaced with the cylinder head. Tool spring depth reach grips to retainer are adjustable to fit most large and small spring appls. For use on a wide range of OHV, OHC and CHV engines. Features a reversible jaw / adaptor