The Edwards Calling Cord Sets are for use with Edwards Cat No. 7930 and 7930L stations. The cord sets have either one (7675 and 7685) or two (7676 and 7686) dependable positive action buttons to insure easy placement of calls. The vinyl outer covering provides a durable insulation that will withstand frequent cleaning and hard usage without cracking or fraying. The security clamp (7615) firmly attaches to a surface or clothing. For use with call stations.