21AMP G3 / V3 MICRO SWITCH
Manufactured by Honeywell as their type V5A130CB3X202, these are a quality high current standard pattern (G3 or V3) Microswitch.
Normally open closed contacts (ON - OFF) rated at 21Amp 250Volt (1/2 HP) contacts have standard 1/4" spade connections.
These are used in dishwashers, many electric showers, cooker over doors and other domestic / industrial equipment where a high current standard pattern microswitch is required.
Dimensions are roughly 27mm x 16mm by 10mm wide.