Thinking about investing in a new garage door opener? If so, you’ll need to understand that there are different types on the market. For instance, you’ll find that the drive mechanism (the equivalent of a car’s transmission) differs from one to the other. Some models have a metal chain, such as what you might see on a bike, while others have a rubber belt reinforced with steel. Yet other models might use a screw method, and then there are jackshaft openers.