Simpson HWDC5.25-KT25 Head-Of-Wall Drift-Clip Connector, Pkg 25The Simpson Strong Tie head of wall drift clip connector (HWDC) is used to secure the head of a wall to the bottom of a slab or beam. The unique design allows anchor screws to be installed closer to the bend, providing a stronger and stiffer connection while also allowing 1" horizontal and 1" vertical movement during seismic and high wind events. HWDC5. 25 provides anchorage location options with a third slot providing a solution for clips overhanging