For example, Iron Pipes have one output port and many input ports. In order to change which port is the output, you need a Wrench. The output is indicated by the port that does not have a little gray rectangle on it.
Wrenches are also very helpful when you discover that you placed something the wrong way. Each time the wrench is used the target engine/pipe will cycle through valid orientations. This means for example wooden conductive pipes have to be placed before attempting to rotate an engine or it will not move.
- 3 x Iron Ingots
- 1 x Stone Gear
Produces: 1 x Wrench