Features and Benefits: . Master set contains the dual Cam Clamp and 4 Cam Clamp singles for dual or quad overhead cam engines. Single Cam Clamps lock gears individually; one per gear. Easy to use - Installs in seconds. Patented 'Uni-Fit' positive lock tooth design securely engages all cam gear sizes. Storage tray included Use on single, dual or quad overhead cam engines to hold valve timing during belt replacement. Ideal for diesel injection pump belt replacement. Constructed from high strength industrial grade non-corrosive materials. .