MEGAFastener Dura-Screws - Phillips Wafer Modified Truss Head Twinfast Point Self Tapping Wood Dura-Screws are primarily used to Decking, Fencing, Roofing, Framing, Timber Frame, Post, and Beam. Thread Type: Deep Thread with Very Sharp PointWood screws are the most frequently used Household Appliances, Furniture, and Woodworking Fastners. They are used primarily for connecting wood to wood and are known for the clamping force that they provide to strengthen a joint. They are also used to attach hardware, cabinets, locks and other items to wood or thin gauge metal.