Provides full side-to-side frame over hang stability and helps maximize front to rear trailer stability. Simple to operate. Extendable drive leg with fold-up handles eliminates trial and error of unsafe lowering of king pin onto tripod stabilizer jack. Large diameter base pads with heavy-duty chains and hooks for stability. Deluxe mode (94-1484) features three extension legs to provide level set-up on unlevel ground. Height adjustment: 94-0819 Standard: 40? to 52?. 94-1484 Deluxe: 41? to 68?. 94-0820 Gooseneck: 29? to 41?.