Simpson Structural Screws SDWH19600DB-R50 SS8118C-11045 50Pc 6" Struc Hx Screw Installs best with a low-speed 1/2-Inch drill and 5/16-Inch hex driver 5/16-Inch heax head Head is stamped with Simpson Strong Tie Stamp and fastener length for easy identification Bold thread design provides superior holding power and cInches fastened members together for consistent installation Tan double barrier double coating for exterior applications