Power Pro LumberTite Structural Wood Screws are general purpose, heavy duty wood fasteners designed for wood to wood construction without pre-drilling. They are ideal for a variety of projects both indoors and outdoors, with a proprietary corrosion resistant coating that is compliant with ACQ and other forms of treated lumber, allowing for use in place of standard lag screws. Power Pro LumberTite Structural Wood Screws have a star drive and low profile wafer head which provides a finished look upon installation.