The Sealey Valve Collet Remover/Installer Lapping Set is designed for the quick removal and installation of valve collets, whether the cylinder head is in situ or on a workbench. To remove or install, firmly push or tap the tool with a hammer; the integrated magnet captures the collets. This set is ideal for replacing broken valve springs or valve stem oil seals without the need to remove the cylinder head from the engine. For in situ use, a suitable adaptor is required to supply compressed air into the combustion chamber, which will hold the valve closed while the valve spring is compressed. The set also includes two valve lapping tools featuring wooden shafts and four sizes of rubber suction cups, suitable for grinding most engine valves. The complete set is supplied in a storage case. Model No. VS1543. Weight: 1.52kg.