RONIS key-operated switches, 22 mm, round, metal, shiny, lock number SB30, with 2 keys, 2 switch positions O-I, latching, 90° operating angle, 10:30/1:30 o'clock, key removal O+I, with holder, 1NO+1NC, spring-type terminals, possible special locks: SB31, 421, 455, Z=20-unit packaging