Truss-Tite Wood Screws are unique fasteners specifically designed to join engineered structural lumber together such as parallel strand lumber (PSL), laminated strand lumber (LSL), and veneer lumber (LVL). Typically these screws are joined with through bolts or nailing/screwing on both sides. Truss-Tite eliminates the need for pre-drilling, as well as the need to fasten from both sides of the beams. | HILLMAN Power Pro 12 Pieces Truss-Tite Heavy Duty Wood Screws | Size 5/16" x 5"