Abstract: A device capable of scoring the exterior side of drywall at a point where two drywall surfaces meet to form a corner and one of the drywall surfaces runs past the other by a distance of approximately less than two inches. The device uses the intersecting surface as a guide and includes a flat guide plate which sits above a C-shaped structure that has a cutting wheel that exists on the same plane as the intersecting surface.

Abstract: A device that prevents an A-frame dolly drywall cart from rolling away from the operator during loading or unloading that is capable of adjusting to various wheel spans in order to accommodate a wide variety of drywall cart models. The device may be stored on the backside of the drywall cart in a position that would otherwise not be used for storage, thus enabling the device to travel with the drywall cart if desired without taking up storage space.