Engine Overhead Cam Valve Spring Compressor Removal Tool OHV/OHC/CHV Auto Motors Heavy Duty Overhead Valve Spring Compressor,Perfect for home or business Ideal for removing valve springs, spring retainers by compressing the valve spring retainer and exposing the valve keeper, remove keepers, uncompress the tool then remove spring Easy to operate,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.