Mount accessories to the to the main column of an Ergotron cart. Use the Interface Bracket to fasten heavier components to the rear of the cart. Or deploy the Light-Duty Brackets for tight attachment of smaller items.Benefits- Provides a versatile interface for attaching a wide variety accessories to the cart- Allows attachment of Ergotron or customer-supplied accessories- Height of attached components can be adjusted by loosening set-screws- Angled design of Interface Bracket attaches to the side two channels while placing the accessory at the rear of cart for more efficient use of space