The Hillman Group 180300 Pronged Tee Nut, 5/16-Inch by 18-Inch, 100-Pack Product Description These tee nuts are barrel shaped fasteners with internal threading and are used when a flush surface is needed. The tee nut has a flat base with prong projections running parallel to the barrel. These prong nuts can be used in hard or soft wood as well as plastic or particle board. When installed, the tee nut sits flush with the fastened material. From the Manufacturer These tee nuts are barrel shaped fasteners with internal threading and are used when a flush surface is needed. The tee nut has a flat base with prong projections running parallel to the barrel. These prong nuts can be used in hard or soft wood as well as plastic or particle board. When installed, the tee nut sits flush with the fastened material. Features Hammer Prongs Into Predrilled Hole Used In Any Project Where Small Nails Are Required Steel Material From The Brand Name: Hillman USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.