These 4 prong t-nuts are made from carbon steel and are zinc plated to resist rust and corrosion. These nuts are used to provide a strong and reliable threaded bushing that easily mounts into wood and panelingof particles. These four points prevent the T-nut from turning when inserted into pieces of wood and tightened. There are 5 different sizes of T-Nuts to choose from to suit your needs for different projects and projects.Convenient to use, just touch these nuts into a suitable size hole and the teeth will hold them in place. Description: A T-nut is a type of nut used to fasten a piece of wood, particleboard, or composite materialsand leaving a grainy surface. It has a long, thin body and a flange at one end, resembling a T-bar. T-Nut flanges have spikes that dig into a piece of wood while the bolt is tightened on the other side ofthe piece, providing a better grip. Technical data: Material: Galvanized carbon steel. Silver. Size and quantity M8 30 pieces. Box contents: 1 set of