- Remove and replace valve springs in GM 8-cylinderengines.
- Heavy-duty tool replaces weak or broken valve springsand guide seals with cylinder head on the engine.
- Compressor is used by removing rocker and fasteningtool to stud with nut.
- Pull on the handle to compressspring.
- Use with 901 or 2992 Air Hold Fittings to keepvalve closed.
- Length: 12-1/2"