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It installs with no predrilling and has been extensively tested in various applications. The new SDS is improved with a patented new easy driving 4CUT tip and a corrosion resistant double-barrier coating. The patented 4CUT tip has a square core and serrated threads to reduce installation torque and make driving easier with no predrilling and minimal wood splitting. A new double-barrier coating finish provides corrosion resistance superior to hot-dip galvanization. Now one screw can handle interior exterior and certain pressure-treated wood applications. 3/8hex washer head is stamped with the No-Equal sign and fastener length for easy indentification after installation.