Level and support your camping trailer or fifth wheel with these easy-to-use scissors jacks. Fit most RVs regardless of ground-to-frame clearance because they can be extended from 4" to 24". Just position jacks, insert the crank handle and turn it to raise the jack arms to the desired height. Each jack uses reliable thread-screw design. Crank can be rotated even when tilted. Jack features black rust-inhibitive coating. Certified 7500-lb load capacity. Per Pair.