66784 Universal Valve Spring Compressor Kit for Precise Removal and Installation of Valve Springs and Retainers on 3/8" and 7/16" Rocker Studs, Specially Designed for Compression on Cylinder Heads. MODELS AND FEATURES: 66784 valve spring compressor, supports 3/8" and 7/16" studs, suitable for most OHV/OHC engines (such as small general-purpose machinery and classic models), valve spring tool designed for accurate engine block head compression.
