The Simpson Strong-Tie RCA-C is an ideal solution for attaching stud framing to concrete supports. This connector provides the most anchor options for attaching to concrete in comparison to other similar connectors on the market. The connector’s design includes holes for a 1/2"-diameter anchor screw or bolt, or for two 1/4"-diameter concrete screws, positioned in a wide array of fastening options — thus saving the installer the time and cost of drilling connector holes at the jobsite. In addition, the RCA connectors have been rigorously tested and load rated, giving you the confidence of quality and performance for your job.