You will get the switch pictured for your classic British motorcycle. This replaces Lucas part # 31563.This is a chrome dip High and Low positions switch for the horn on British bikes with 7/8″ handlebars.

This switch 31563 is made to go on part number 97-1870 (handlebars) which comes with two threaded holes for those two screws (seen on the picture) to go into. If you are mounting them to any different bars, then you will need to drill and tap two holes to mount this switch.