Adamoss Ladder Jacks 2 Pack for Metaltech Scaffolding Platform,Two-Rung Short Body Extension Ladder Jack for Working Stage,2024 Upgrading Design & Strengthen Stability.

Why I reached for these ladder jacks

A staging platform between two ladders is still one of the fastest ways to cover ground on exterior work—painting long runs of siding, cleaning high windows, repairing soffits, or setting trim. Full-frame scaffolding is wonderfully secure but slow to move. Pump jacks are a commitment. For many tasks, a pair of ladder jacks hits the sweet spot: quick set-up, strong support, and a comfortable, wide work surface.

I’ve been using the Adamoss ladder jacks for the past few projects to see how they stack up. In short: they’re stout, straightforward to set up, and confidence-inspiring underfoot, provided you use them with the right ladders and follow best practices.

Design and build

These are welded steel, short‑body, two‑rung jacks sold as a pair. The trapezoidal frame hooks over two ladder rungs and creates a saddle for a platform (the manufacturer specifies a 20-inch-wide stage to meet OSHA decking requirements). The units can mount on either the inside or outside face of an extension ladder, which makes placement more flexible when you’re working around eaves, shrubs, or tight walkways.

A few details worth calling out:

• The adjustable rung brackets accommodate both round and D‑shaped rungs. That matters if you own ladders from different brands with slightly different rung profiles.
• A safety screw threads through the bracket to keep the jack from lifting or walking off the rungs. It’s a simple step that adds real security.
• Cut grooves on the platform saddle are designed to improve grip and distribute load, reducing the tendency for the stage to skate.
• The short‑body design keeps weight down and keeps the jacks closer to the ladders, which I find reduces flex compared to longer arms.

Fit and finish are what I’d expect from a heavy-gauge steel jack: clean enough welds, squared brackets, and hardware that threads smoothly. They’re not delicate or fancy; they’re built to work.

Setup and compatibility

If you’ve never staged off ladder jacks before, the process is about as fast as it gets—once you know the constraints:

1. Use two compatible extension ladders. Set both at the same angle (the 4:1 rule—one foot out for every four feet up—is a good baseline) and at equal height.
2. Hook each jack over two rungs at matching elevations, then snug the safety screws so the brackets can’t bounce free.
3. Drop in a 20-inch-wide platform rated for the load you’ll put on it (you, your tools, and any materials). Fully deck the span; don’t use a narrow plank and don’t rely on a single 2x10.
4. Tie off or secure what you can: ladders at the top, plank at the jacks, and stabilize the feet with levelers or pads if the ground is uneven.

Because the brackets are adjustable, the jacks cinched down nicely on my D‑rung fiberglass ladders and also grabbed an older aluminum ladder with round rungs. Where I ran into friction wasn’t the jack—it was ladder choice. These work best with two matching or at least compatible extension ladders that share rung spacing and geometry. If you try to pair a multi‑position/hinge ladder on one side with a standard extension on the other, you can wind up fighting to get the platform level. That’s not a flaw unique to this set; it’s the nature of ladder‑jack staging.

Mounting to the inside or outside face is genuinely useful. Inside mounting tucked the stage closer to the wall, which made painting fascia easier. Outside mounting gave me space to reach under soffits. Swapping sides takes seconds.

On-platform performance

Underfoot, the Adamoss jacks feel solid. The platform saddle is deep enough to capture the 20-inch stage securely, and the grooved seats resist lateral shift. With the ladders set correctly and the safety screws snugged, I felt very little oscillation stepping on and off the stage and walking the span. Flex was dictated more by the ladders and the plank than by the jacks themselves, which is what I want from this component.

I used the setup for scraping and repainting clapboards, replacing a second-story window stop, and cleaning a large picture window. Moving the staging bay by bay was quick: loosen the safety screws, lift the jacks, climb down, bump the ladders, and rehang. It’s not as fast as power pole jacks for long runs, but it’s lighter and easier to set up for smaller jobs.

Safety notes from real use

Ladder‑jack staging is safe when done by the book and sketchy when it’s not. These jacks incorporate helpful features—the safety screw and stable saddle—but the system is only as safe as the setup. A few tips from my sessions:

• Use a real 20-inch platform with a proper rating. The jacks are built around that width for a reason.
• Keep the ladders matched and the rung elevations identical. If the platform rocks or one jack sits higher, reset rather than “making it work.”
• Level the feet. A set of ladder levelers or pads is worth every penny when you’re on mixed surfaces.
• Don’t overreach. Walk the platform or move the bay instead of leaning beyond the rails.
• Inspect before every use. Check welds, the safety screw threads, and any deformation on the rung brackets.

Follow those, and this setup feels as secure as ladder jacks get.

Durability and care

Steel jacks take abuse well. Mine picked up the usual scratches and scuffs from riding in the truck and from ladder rungs, but nothing more. I wipe them down after wet jobs and put a drop of light oil on the safety screw threads occasionally to keep them spinning freely. Because the design is simple, there isn’t much to fail beyond abuse or neglect.

What I liked

• Stout, welded steel construction with a stable saddle
• Adjustable brackets that truly fit both round and D rungs
• Safety screw that positively locks the jack to the ladder
• Inside/outside mounting options for better positioning
• Quick setup and teardown, ideal for short runs or punch‑list work

What could be better

• Works best with two matching extension ladders; mixing ladder styles complicates leveling
• The short‑body format keeps things tight to the ladder, which is great for stiffness but gives you less reach around gutters or deep eaves than some long‑arm designs
• They’re not light. That’s the tradeoff for steel strength, but you feel it carrying everything to the setup

Who these are for

• Pros and serious DIYers who regularly stage between two extension ladders for painting, siding, or window work
• Crews that value quick deployment without hauling full scaffolding
• Owners who already have two compatible extension ladders and a proper 20-inch platform

If you only own a single multiposition ladder or you’re frequently on irregular grades without levelers, a small rolling scaffold or pump jacks might suit you better.

Value

Given the build and performance, these sit in a very reasonable spot. You’re not paying for brand gloss, but you’re getting the strength and stability you need. For anyone who stages a few times a season, they justify themselves quickly in setup speed alone.

The bottom line

The Adamoss ladder jacks do the fundamental things right: they mount securely, hold a proper platform without fuss, and feel steady when you’re working. They’re not magic wands—ladder‑jack staging always demands careful setup and two compatible ladders—but within that framework, these are reliable, straightforward tools.

Recommendation: I recommend these ladder jacks for anyone who already works off extension ladders and wants a fast, sturdy staging option. They’re stable, adjustable for common rung types, and include thoughtful safety touches that inspire confidence. If your kit doesn’t include two compatible ladders or you often work where leveling is a headache, consider a different access solution; otherwise, this pair is a strong, dependable choice.