Simpson RCKW5.5-R10 Rigid Kneewall Connector Clip, Pkg 10The Simpson Strong Tie RCKW rigid connectors have been developed to resist overturning moment at the base of exterior kneewalls and parapets as well as interior partial height walls. These connectors offer a unique anchor hole pattern that permits anchorage to both concrete and structural steel, with the larger hole designed to accommodate 1 2" diameter concrete screws such as the Simpson Strong Tie Titen HD. The RCKWS is a heavy 171 mil (7 ga.)