Grass Unisoft adds on to your existing self-closing cabinet doors to create a soft closing action. No more slamming sounds from your cabinet doors. Works on the following cabinet and door types: Face Frame Cabinets with overlay doors and self-closing hinges. Frameless Cabinets with full overlay doors and self-closing hinges. Self-closing hinges are hinges which are spring loaded so that they close the cabinet door the last 1 to 2 inches of travel. See the document found under Downloads to view images showing the difference between Face Frame and Frameless cabinets. Unisoft add on device is not handed. Works on either left hand or right hand opening doors. Closing action is adjustable after installation. Typical installation location is above the top hinge on the door. Housing and adjustment knob are made from plastic. Features a soft plastic tip for gentle contact with the inside surface of the cabinet door. PLEASE NOTE: This product has two screw holes, however, it is installed using only one screw depending on which side makes for an easier