In snap action contacts, the movement of the actuator applies force to an overcenter mechanism. This mechanism creates a quick change in contact state when the trip point is reached.Reversing the motion of the actuator to a given reset point causes the contacts to snap back to their original positionSpecification: Model:V-156-1C25 Actuator Action:Momentary Actuator Type:Roller Hinge Lever Rating Voltage & Current:DC 0.6A 110V AC 1.6A 220V Contact Configuration:1NO,1NC(SPDT) Switch Body Size:2.8 x 1.5 x 1cm / 1.1" x 0.59" x 0.4"(L*W*H) Fixing Holes Dia.:0.31cm / 0.12" Button Height:0.3cm / 0.12" Rated voltage: 250V Rated current: 15A Terminal cutting Width:0.5cm / 0.2" Level Length:27mm/1.1" Material:Plastic, Metal Main Color:Red, Black Net Weight:37g Package Include: 5 x Micro Limit Switch