OREGON 546950 – Hydraulic Assembly, Complete, for Hydraulic Assist Bench Grinders “list-style-type:square”Compatible models include Oregon 620-120 Hydraulic Assist Saw Chain Bench Grinders Product Type: Replacement and Miscellaneous Parts Category: Misc Parts >Oregon is the world leader in chainsaw guide-bars. It brands bars for many major chainsaw manufacturers & sells Oregon-brand in the replacement market worldwide. Oregon chains are used as original equipment by 90% of the world’s chainsaw manufacturers & by most of the world’s professional Loggers, farmers, & homeowners. Oregon also produces replacement mower blades, belts, & several other aftermarket replacement parts for power equipment.