Accessory shelf mounting mechanism

A mounting mechanism useful for swivelly attaching a secondary work surface, such as a computer mouse platform or other accessory work shelf, to a primary work surface, such as a computer keyboard platform or a table or desk, and furniture, such as computer support furniture, having an accessory work shelf swivelly attached to a primary work surface. The mounting mechanism facilitates swivel movement of the accessory work shelf relative to the primary work surface while maintaining a constant but easily adjustable tension. A method for attaching both of said accessory work shelf and said primary work surface to a mounting mechanism.