Simpson Strong-Tie. DHPD hardwood deck screws are specifically designed for fastening ipe and other hardwoods to pressure-treated joists. A paddle-style drill point eliminates the need to pre-drill holes, and reduces the chance of splitting the wood, the maker says. The screw is able to counter-bore hard material thanks to reinforced mid-wings that let the screw head countersink for a clean, finished look. The collated DHPD screws are made from type 305 stainless steel for corrosion resistance and work with the maker’s Quik Drive autofeed screw fastening system. 800.999.5099. www.strongtie.com.