OVERHEAD VALVE SPRING COMPRESSOR FEATURES Wide Compatibility The valve spring compressor tool is compatible with various vehicle models, including those with dual springs. Overhead Design The overhead design lets you attach the valve spring compressor to your valve springs without removing the cylinder head. Secure Grip This spring compressor tool has two different length jaws for easy attachment to valve springs. Sturdy Construction This spring compressor is made from carbon steel with zinc and black oxide coating for rust resistance and durability.