Descriptions:NO-OFF contact type, keylock rotary selector action, 16mm panel cutout diameter.Button locking when rotary, rotary again the key to reset.Both of 2 Positions can pull out the key.Used widely to control the electromagnetic starter, contactor, relay and other automatic control electric circuits.Features:Rated Current & Voltage: AC 250V/0.5ALight Voltage: No Light Include;Model: S12014-135Position: 2Operation Type: Locking;Contact Type: NO OFFMounting Hole Dia: 12mm / 0.47"Total Size: 29*16mm (H*D)Material:Copper Chrome PlatingTerminal: 2 PinsTerminal type: WeldedPackage Content:2 x Key Push Button Switch / 4 x Keys