All the features of the Pro-Series with automatic freefall.100% 316 stainless steel case12V motor provides fast line speedA snap to install5 Year Warranty700: Rope size: 1/2" 3 strand and 8 plait. Chain: 1/4" G4 ISO. 500 power watts1000H: Rope size: 9/16" - 5/8" 3 strand and 8 plait (5/8" only). Chain: 5/16" G4. 700 power watts.