Dusters are used for doubling your ores, there are 4 tiers of Dusters.
WARNING: Check your engineering diary, the Dusters cannot be used without performing the research task (using the previous tier of Duster)
Dusters can grind almost any ore and metal into a dust that can then be smelted into an ingot in a furnace.
Has no GUI, click with an item/block in your hand to put it in. Then jump on the block a few times and the dusts will pop out.
This block is only usable by players and is not meant to be automated.
The semi-automatic Duster can be partially automated. It takes input from pipes and hoppers, but you still have to jump on it. Use a Machine Configurator to configure what side to output to. It can output to the same side it got its input from.
This Duster doesn't allow for automated input but you no longer have to jump on it, it uses power to grind the ores you feed it.
This is the top tier Duster, it allows for both automated input and processing. It is powered by nearby BuildCraft lasers, the more lasers the faster it works. Automatically outputs dusts, use a Machine Configurator to configure the sides.