Bold thread design that provides excellent holding power
SawTooth point ensures fast starts, reduces installation torque and eliminates the need for pre-drilling in most applications
Under-head nibs that offer greater control when seating the head
Large washer head provides maximum bearing area (0.65 in head Dia)
Size identification on all SDWH screw heads
Double-barrier coating provides a level of corrosion resistance that is equivalent to hot-dip galvanization (ASTM A153, Class D) in most non-marine environments