BOYISEN RV Slide Out Support Jacks — 20–49 in Adjustable, 5,000 lb Capacity, Galvanized Steel Base

BOYISEN RV Slide Out Support Jacks are adjustable stabilizers that span 20"–49" and provide up to 5,000 lbs of support to reduce sagging and vibration for slide-out sections of travel trailers and campers.

When you park your RV, an unsupported slide-out can sag, bend rails, or shake when people move inside. The BOYISEN slide out stabilizer jacks install quickly and let you add firm, temporary support beneath the slide-out frame, protecting hardware and improving interior steadiness without complicated lifting equipment. Built from galvanized steel and fitted with a broad base and U-shaped top, these jacks focus on durability, corrosion resistance, and straightforward operation with a drill or included crank.

How do these jacks attach and adjust to my RV's slide-out?

Installation centers on positioning the U-shaped top under the slide-out frame and extending the threaded shaft to the desired height. You can use the supplied hand crank or a power drill with the provided socket for quicker adjustments. Safety comes from using the correct hole pin position and holding the U-shape while turning to keep the jack aligned.

• U-shaped top fits most slide-out frames for secure contact
• Threaded shaft and pin holes provide a 20"–49" adjustable range
• Includes crank handle and drill socket for fast operation

What load and ground support do these jacks deliver?

Each jack is rated to support up to 5,000 pounds of compressive force, giving robust support for most slide-out sections when used in pairs. The 5-inch diameter circular base spreads load over a larger surface area to help prevent sinking into soft ground. Remember, these are stabilizers for supporting and preventing damage, not for lifting the entire vehicle.

• 5,000 lb capacity for heavy-duty stabilization
• 5" diameter base reduces ground penetration and increases stability
• Galvanized steel construction resists rust and outdoor wear

Will using these jacks protect my slide-out mechanism long-term?

Adding support beneath the slide-out reduces stress on rails, rollers, and seals by limiting deflection and vibration when parked. That decreased flex helps prevent bending or misalignment that can lead to leaks or component wear over time. Regular use during camping stops can extend the functional life of slide-out hardware when paired with routine maintenance.

• Prevents rail sag and mechanical stress on slide mechanisms
• Reduces interior shaking for a more comfortable living area
• Galvanized finish helps protect the jack itself from corrosion

How easy is it to store and transport these stabilizers with my rig?

Each stabilizer folds down to a compact profile and weighs considerably less than permanent jacking systems, making them convenient to stow in exterior compartments or cargo areas. The simple, hand-operated design and included socket keep accessories minimal. They’re also quick to set up and remove, so you won’t spend extra time during arrival and departure from campsites.

• Compact form factor for easy storage in RV bays
• Light enough for single-person handling when needed
• Quick-install operation with a drill or the included crank

Who is this for? BOYISEN RV Slide Out Support Jacks are aimed at RV owners, seasonal campers, and travelers who want a straightforward, affordable way to stabilize slide-out rooms and protect slide mechanisms without permanent modifications. They suit owners of travel trailers, fifth wheels, and motorhomes that need temporary support to prevent sag, reduce interior movement, and preserve slide-out components. If you want durable, corrosion-resistant support you can deploy quickly with minimal tools, these jacks are a practical accessory to keep on board.