Power Pro Structural Lag Screws are a complete line of innovative, building code-approved structural wood screws that outperform the competition. The patented screw design offers features that are unmatched in the category and set a new benchmark for performance.The proprietary corrosion resistant coating is compliant with ACQ and other forms of treated lumber. Unlike competitor structural fasteners, the Power Pro Structural Lag Screw features an innovative thread design and a self-drilling tip to penetrate and sink into wood quickly, resulting in a 30% faster installation, and no pre-drilling. Drive more screws per battery charge. Easy-to-read depth code imprinted on the head allows for quick post-inspection.