BOYISEN RV Slide Out Support Jacks 20–49 in Adjustable Pair, 5,000 lb Capacity, Galvanized Stabilizer

BOYISEN RV Slide Out Support Jacks are adjustable stabilizer stands that secure and support slide-out rooms on trailers and campers, offering 20–49 inches of height adjustment and up to 5,000 lb capacity per pair.

When you extend a slide-out on your RV, the extra cantilevered weight and movement can stress the slide mechanism and create wobble inside. The BOYISEN slide out stabilizers are designed to tuck under the slide frame and add a steady, corrosion-resistant support that reduces sagging and vibration without replacing factory components. They operate with a drill or included crank and come as a two-jack set with accessories for quick installation and adjustment.

How do these jacks attach to my RV slide-out and how easy are they to use?

These supports fit beneath the U-shaped top bracket to bear against the slide-out frame; installation does not require welding or permanent modification. Height is set by moving the pin into one of the frame holes and fine-tuned via the threaded rod using an electric drill or the supplied hand crank.

• U-shaped top for common slide-out frame profiles
• Pin-and-hole coarse height settings plus threaded micro-adjustment
• Includes crank handle and drill socket for fast operation
• No drilling or welding to your RV required

What load and height range do these supports handle?

Each set is rated to stabilize loads up to 5,000 lb, intended to support slide-out weight and reduce stress on the slide rails—note they are not designed to lift the entire RV. Height adjusts from 20 inches up to 49 inches through a combination of pin positions and screw extension, allowing use on most travel trailers, fifth wheels, and motorhome slide-outs.

• Adjustable span: 20"–49" for versatile mounting
• Rated capacity: 5,000 pounds (stabilizing application)
• 5" diameter circular base for ground stability and anti-sinking
• Galvanized finish for corrosion resistance outdoors

Will these supports protect my slide mechanism and interior comfort?

By supporting the outer end of the slide, the jacks reduce upward and downward flex at the rail junction, which helps prevent bending or long-term wear to the slide mechanism. The extra support also cuts down on the rocking or vibration you feel inside when people move around the slide-out area.

• Reduces sag and rail stress to prolong slide mechanism life
• Lessens interior shaking for improved comfort while parked
• Stable base reduces the chance of sinking on softer ground
• Galvanized steel construction resists rust in outdoor conditions

What comes in the box and are there any safety notes?

BOYISEN supplies two slide out support jacks, a crank handle, and a drill socket so you can operate the threaded adjustment with an electric drill. The supports are made from heavy-duty steel with a galvanized coating for durability. Important: use the jacks as stabilizers only; do not use them to lift or jack up your RV.

• Package: 2 stabilizer jacks, 1 crank handle, 1 drill socket
• Finish: galvanized to resist corrosion
• Design note: intended for added support, not vehicle lifting
• Tip: hold the U-shaped top while adjusting threads for safer control

Who is this for: These BOYISEN slide out support jacks suit RV owners, full-time campers, and weekend travelers who want to protect slide-out rails, reduce interior movement, and extend the life of their slide mechanisms. They are particularly useful for those parking on uneven or soft surfaces, or anyone who experiences noticeable wobble when the slide-out is extended. Installers and DIY-minded owners will also appreciate the drill-friendly adjustment and included accessories for quick setup.