Dry wall screws or plasterboard screws are used for fixing plasterboard sheets to either wood or metal partitions or joists. It’s essential to use these screws as they are very strong and durable and the bugle head shape of the screw is designed to hold the plasterboard without tearing the paper, although it is possible to tear the paper if too much torque is applied. There are several different lengths of dry wall screw available. It is important to use screws that are the correct length, especially when over boarding an existing ceiling etc.