Actuator

The Actuator is a mechanism item sold by the Mechanic for 10 silver coins each. When activated, the tile it sits on toggles between active and inactive state, effectively allowing any block be toggled in this way like Active Stone Blocks.

Like Wire, Actuators are normally invisible and only become visible when a mechanism item is selected and are removed with the Wire Cutter.

A good tip is use Actuators to be used like doors and trapdoors.