Conceived out of real world experience by truck drivers and industrial crane operators, EZ-Winder™ was developed for use on the majority of Semi-Trailers on the road today. Engineered to withstand virtually any weather or temperature conditions (-30°F thru 170°F). EZ-Winder can eliminate many common injuries associated with “hand cranking.” Battery/electric powered operating system assures unmatched performance and enduring quality.