The Factory Input Enhancer allows you to mass produce any Recipe that a Factory Input (Factory) can make. For example, if you bind a single Enhancer to its Factory, you make 2x the standard recipe. If you bind 5 Enhancers to the Factory, you make 6x the recipe. This can be useful to make things en masse, but if you run out of the multiplier of ingredients, the recipe will not be made even in its less massed form.
Examples on How-To: Crafting