BOYISEN RV Slide Out Support Jacks 19–47 in Adjustable, 5000 lb Capacity, Steel with Quick-Release & Micro-Adjust

When you extend your RV's slide-out, the added weight can strain rails and frames; these BOYISEN support jacks give immediate structural backup, reducing sag, preventing bending, and lowering the risk of costly frame repairs. Built from thick-gauge steel with a corrosion-resistant finish and a practical quick-release and micro-adjust crank system, they combine rugged durability with precise, tool-free setup.

How do these jacks protect my RV’s slide-out mechanism?

The jacks transfer weight from the slide-out assembly to the ground, taking stress off the slide rails and frame. By supporting the outer end of the slide, they reduce flex and keep alignment intact during use and travel stops.

• Each jack holds up to 5,000 lbs to absorb heavy loads safely.
• Wide 19–47 in adjustment fits low trailers and tall fifth-wheels alike.
• Prevents sagging that leads to bent rails and costly repairs.

How fast and accurate is the setup?

Setup is a two-step process: quick-release pin for coarse positioning, then the micro-adjustment crank for a precise snug fit. Most users can position and fine-tune a pair in minutes without tools.

• Quick-release pin offers fast, tool-free height selection.
• Micro-adjust crank lets you dial in millimeter-level pressure against the rail.
• Third storage pin hole locks for compact, safe transport when stowed.

Will these jacks hold up in outdoor conditions and heavy use?

BOYISEN designed these jacks for long-term exposure: thick steel components plus an anti-rust coating resist corrosion and wear. The robust construction and load capacity mean the set is meant to be the last replacement you buy for slide-out support.

• Heavy-gauge steel construction resists bending under load.
• Durable anti-rust finish protects against rain and road salts.
• Engineered for repeated use season after season without performance loss.

Which RVs are these jacks compatible with and how many do I need?

The 19–47 inch range covers most travel trailers and fifth wheels; the adjustability makes them suitable for smaller pop-outs as well as large, heavy slide-outs. Typically buyers install a pair for a single slide-out; larger or unusually heavy assemblies may require additional supports.

• Range fits low-profile trailers through high-rise fifth-wheels.
• One pair is standard for most single slide-outs; add more for extra-large rooms.
• Third storage pin secures jacks compactly when not in use.

Who is this for: RV owners who value protecting their slide-out investment and want a durable, easy-to-use support solution. If you use your slide-out frequently, tow over varied roads, or simply want to avoid frame and rail repairs, BOYISEN’s 5000 lb adjustable jacks provide peace of mind with fast setup, weather-resistant construction, and heavy-duty load capacity.