Power Pro® TrussTite® Structural Wood Screws are a unique fastener specifically designed to join engineered structural lumber together such as parallel strand lumber (PSL), laminated strand lumber (LSL), and veneer lumber (LVL). Typically these are joined with through bolts or nailing/screwing on both sides. The TrussTite® Structural Wood Screws eliminate pre-drilling and the need to fasten from both sides of the beams. The proprietary corrosion resistant coating is recommended for use with ACQ and other forms of treated lumber.