Some features of Craftsman garage door openers are belt or chain drives, battery backups and 1/2 or 3/4 horsepower. Belt-drive Craftsman garage door openers are designed to be significantly more quiet than chain-drive garage door openers.
Sears.com suggests installing Craftsman belt-drive garage door openers in garages that have rooms above or near them, in order to minimize the noise disturbance during operation. The Craftsman garage door openers that are chain-drive are advertised as being more powerful than belt-drive openers and more dependable.
The battery-backup feature is only equipped in Craftsman belt-drive garage doors. The battery backup in these garage doors prevents the opener from dying during a power outage. Sears.com states that the battery backup can last for up to 20 open-and-close cycles during the first 24 hours during an electrical power outage.
The 1/2 horsepower feature is installed in both Craftsman belt- and chain-drive models. The 1/2 horsepower feature is advertised by Sears.com as powerful enough to lift most residential garage doors up to 7 feet high. Both the belt- and chain-drive Craftsman opener models come with 3/4 horsepower options as well. The 3/4 horsepower garage door openers are designed for heavily used garage doors, where customers are opening and closing the door frequently.