Molded on Pro Lock connectors will not pull away from the cord body and offer extra water resistance. Automatic locking feature: insert male end into our Pro Lock connector, push together to lock & pull the collar down to unlock.We use high impact polycarbonate on both housing & collar on our Pro Locks to guarantee hard service, extra-heavy duty use. Pro Lock Pull Strength: 80 Lbs. horizontally or vertically. Lighted Amber Power Check plug and Pro Lock connector indicates there is power running through the cord and connector.Our -58F (-50C) special coldweather PVC jacket guarantees flexibility in temperatures well below freezing