... 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 ... %deposit by T/T,and balance paid off before shipment by T/T or L/C