George Risk Industries 184-12-B 1 Inch Steel Door SPST Switch Set

George Risk Industries 184-12-B 10 PACK supplies ten 1 inch SPST switch sets for steel-door physical-security applications. The single-pole, single-throw arrangement gives the security circuit one defined contact path for reporting a door condition. Use this pack where the door hardware calls for the 1 inch switch format and where ten sets are needed for similar door points. Steel doors present a different mounting environment from wood or aluminum openings, so the stated steel-door application matters when selecting a door switch set. The 1 inch size is the key mechanical selection point for this configuration. In circuit terms, SPST means one pole and one throw, supporting systems that expect a single switched circuit from the door point rather than a multi-contact arrangement. For installations with multiple similar openings, the 10-pack provides the same switch-set configuration in one package. Specify the circuit as SPST and verify that the intended door construction is steel before installation. This configuration is distinguished by its 1 inch steel-door format, SPST contact arrangement, and ten-set package quantity. It is suited to physical-security door monitoring where those three selection requirements match the application.