There are multiple types of garage door openers, with the belt-driven and chain-driven varieties being the most common. In addition to these, you can also find a screw-driven and direct drive system, a popular option in Europe. Direct Drive systems invert the usual operation of these systems. Rather than the engine turning a belt or chain to draw up the door, instead, the engine is attached to the garage door and travels the length of the chain to open the garage. This style of garage door opener falls between the belt-driven and chain-driven varieties in terms of quiet. The belt-driven garage door is still the overall quietest of all the ones on the market.