... after removing the collets. Good quality ,hot selling car valve spring compressor 1,These tools are designed to compress and ... release valve spring after removing the collets.2, Pantograph-type levers ensure ... a consistent coaxial contact with the valve.3, Contents:Driving adaptor 16mm, 19mm, 23mm, 25mm, 30mm.4, Length pressure screw 70mm, 110mm ...