K16-411 6 Mm Maintained Selector Switch, 2 Position, Round, SPDT. The Kacon K16-411 maintained selector switch has a round head with an SPDT contact arrangement. Designed for 16 mm (5/8″) mounting holes. Snap action contacts are 24K gold plated alloy, rated at 1A & 110VAC. 2 position switch. Rated IP 65. A maintained selector switch remains in the same position until that position is manually changed, rather than automatically going back to a default position.