OREGON 522651 – Arm Return Spring for Oregon Saw Chain Bench Grinder (511AX, 520-120)”list-style-type:square”Compatible models include: Oregon 511AX and Oregon 520-120 Saw Chain Bench GrindersProduct Type: Replacement PartsCategory: 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.