Permits valve springs and valve stem oil seals to be replaced without the need to remove the cylinder head when used in conjunction with Model No. VS1601 Compressed Air Adaptor. Reversible jaw adaptor and automatic cam-action lock to preset spring tension. Suitable for use on a wide range of OHV, OHC and CVH engines.Note: Not suitable for engines with deep-seated valves. Features: • Permits valve springs and valve stem oil seals to be replaced without the need to remove the cylinder head when used in conjunction with Model No. VS1601 Compressed Air Adaptor • Reversible jaw adaptor and automatic cam-action lock to preset spring tension • Suitable for use on a wide range of OHV, OHC and CVH engines • Note: Not suitable for engines with deep-seated valves Specifications: Guarantee:1 Year Model Number: VS160