QUICK - Removal/installation of valve collets with the cylinder head in situ or on a workbench. REMOVE/INSTALL – By firmly pushing or tapping the tool with a hammer. The magnet in the tool captures the collets. IDEAL -For replacing broken valve springs or valve stem oil seals without removing the head from the engine. USE IN SITU - A suitable adaptor will be required to allow compressed air into the combustion chamber to hold the valve closed while compressing the valve spring. INCLUDES - Two valve lapping tools with wooden shafts and four sizes of rubber suction cups. SUITABLE - For grinding most engine valves. STORAGE CASE – Keeps everything in one convenient place.