Camden Door Controls CM-40/2 4 1/2” Round All-Active Switch.Embossed with wheelchair logo in blue. Heavy-duty, ADA-compliant door controls with 4-1/2” round faceplates are stainless steel, and the assembly is designed for easy installation. Switches mount to standard 2 x 4 electrical boxes. All-active switches are complete ready-to-install assemblies. They are supplied with stainless steel Allen screws and an Allen wrench for mounting.