The SPAX Factor - For the craftsman that concentrates on the details, We Work for You. For the Pro that puts quality first, we help you create stronger connections, enhance performance and improve results when your reputation is on the line. Say goodbye to your father's traditional lag. SPAX PowerLags offer superior installation performance and durability over traditional lag screws and carriage bolts for structural wood construction. Made of carbon steel and coated for long term durability to ensure your project endures. U.S made SPAX is your trusted partner for your fastening needs. Bit included in box. Do it Once, Do it Right with SPAX.