Wuno Shop 10 Pcs Wall Plate Spacer, Outlet Spacers for Electrical Box, Flush Fit Device Leveling Plate, Metal Outlet Shims, Receptacle Leveler for Fixing Walls Device - White

Why I reached for these spacers

A wavy wall and a proud outlet are a frustrating combo. In one bathroom renovation, the new tile brought the wall surface forward just enough to leave a gap between the devices and the finished wall, and a couple of older plastic boxes had loosened up over time. I didn’t need a full box extender everywhere; I needed a fast, repeatable way to bring devices flush and stable. That’s what pushed me to try the Wuno wall plate spacers—a ten‑pack of thin, metal shims sized for typical single‑gang outlets and switches.

Design and build

Each spacer measures roughly 0.047 x 2.28 x 4.25 inches, finished in white. The thin profile is the point: about 3/64 in. of correction lands right in the sweet spot for minor drywall irregularities, a slightly recessed box, or a crumbled section at the screw tab. The metal feels stiff and stays flat, so it doesn’t telegraph odd ripples under screwless wall plates the way flexible plastic shims sometimes do. The coating has held up to fingerprints and light abrasion in my use and, importantly, hasn’t flashed rust even after a humid week working near a shower niche.

The cutout and mounting hole placement align with standard single‑gang device ears. They’re designed to sit between the device tabs and the finished surface, spreading clamping pressure so you can tighten the device to a solid, flush plane without overtightening—and without relying on crumbling drywall for support.

Installation: what actually worked

My process looked like this:

• Kill power at the breaker and verify with a non‑contact tester.
• Loosen the device mounting screws enough to tip the outlet or switch forward slightly.
• Slip the Wuno spacer over the screws, oriented so it lies flat against the wall surface.
• Re‑seat the device and tighten until the face is flush and solid.
• Fit the wall plate and check alignment.

On slightly recessed boxes (less than about 1/8 in. behind the finish), a single spacer was enough. On one outlet with a deeper setback, I stacked two spacers with no issues—just be mindful that stacking increases the clamping distance, so ensure your device screws have the thread to accommodate. The metal doesn’t deform much as you tighten, which helps achieve a crisp, consistent depth across multiple devices in a room.

The biggest time saver: once the device was squared up with a spacer, screwless plates snapped on cleanly with even reveals. No fussy micro-adjustments or paper shims.

Performance in the field

I used these on a mix of standard duplex outlets and traditional toggle and decorator switches. They excel at three jobs:

1) Stabilizing loose boxes where the drywall under the device ears has blown out
2) Bringing devices flush to the plane of new tile or paneling that added just a bit of thickness
3) Creating a uniform depth for a consistent look when combining old and new devices

Tension holds well. I could snug the screws to “firm” without crushing anything, and the devices felt secure in the wall afterward. The metal plate distributes pressure better than the typical little plastic spacers or washers, so it resists that “still a little bouncy” feeling.

Where it falls short (and workarounds)

• Smart switches with bulky bodies: Some smart switches (especially deeper, multi-button models) are wider near the mounting ears. The Wuno spacer’s inner cutout is sized for standard devices, so I had to notch one spacer with snips to clear a switch body. If you’re installing a whole bank of smart switches, plan for minor trimming or look for a spacer with a larger central opening.

• Multi-gang boxes: These are sized for single‑gang geometry. In a two‑ or three‑gang box, the interior devices sit closer together, and this spacer can interfere between them. I made it work by trimming the spacer into a half‑width shim for the outer devices and skipping it for the inner devices, but it’s not ideal. For multi‑gang work, a set of narrower, purpose-made shims or a gang-sized leveling plate is easier.

• Large recesses: If your box sits dramatically behind the surface (say, 1/4 in. or more), this isn’t the right tool. Use a listed box extender to bring the enclosure forward. I treat these Wuno spacers as finish-levelers, not structural box relocators.

• Visible edges with ultra-thin plates: The spacers are white, which blends with light walls, but a tiny sliver can show with some ultra-thin metal plates if the device opening is generous. It’s minor, and I only noticed it once under bright side-light. If you’re using very tight-tolerance plates, check one location first.

Durability and safety

The coated metal resists warping and holds a flat plane. After multiple installs/removals, screw holes didn’t oval out, and the spacers stayed usable. The finish didn’t chip during normal handling. I like that a rigid shim won’t creep or cold-flow over time the way stackable plastic spacers sometimes can.

This is basic, but worth stating: cut power. You’re working at the device screws, and while the spacer sits outside the box under the device ears, it’s still metal. With the breaker off, installation is straightforward and uneventful.

How it compares to other options

• Nylon stackable shims: Super adjustable, inexpensive, and great for oddball thicknesses. They can feel squishy, and I’ve had them bind slightly under screwless plates. The Wuno spacer delivers a cleaner, crisper face with fewer pieces to juggle.

• Washers behind device ears: The DIY classic. They work, but they localize pressure and can tilt a device or leave it springy. The Wuno’s plate spreads load and is faster once you’ve done one or two.

• Box extenders: The right answer when the box is set too deep or you need to maintain code-required coverage into the finish. Extenders move the box forward; spacers tune the device face. I keep both in my kit.

Who will benefit

• DIYers finishing a backsplash, wainscoting, or new tile who end up with outlets/switches sitting shy of the surface
• Folks replacing wall plates with screwless designs and wanting dead-even device depth
• Pros who want a quick, repeatable single‑gang leveling solution for punch list fixes

If your project involves primarily multi‑gang boxes or a lot of smart switches with chunky bodies, expect to do a bit of trimming—or consider a different style spacer.

Small tips that helped

• Snug, don’t reef: Tighten until there’s no wobble and the device face is flush; over-torquing can distort plates or the device yoke.
• Test fit with the actual wall plate: Different plate styles sit differently. A quick plate dry-fit guarantees the reveal you want.
• Keep a pair of snips handy: A small notch cut makes these spacers compatible with stubborn smart switches or tight multi‑gang layouts.

The bottom line

The Wuno spacer is a simple, well-executed fix for uneven walls, slightly recessed boxes, and wobbly devices. Its thin, rigid metal plate brings standard outlets and switches into a clean, consistent plane and does it faster and more reliably than a handful of plastic shims or washers. It’s not a one-size-fits-all solution—multi‑gang boxes and some smart switches push its geometry—but for the bread‑and‑butter single‑gang situations most of us see, it does the job neatly.

Recommendation: I recommend it for anyone looking to level and flush-mount single‑gang devices quickly and cleanly. The ten‑pack is enough to settle an entire room’s worth of outlets and switches, and the metal construction keeps things flat and solid over time. If you’re dealing with deep-set boxes, grab a box extender instead; if you have a wall of smart switches, plan on minor trimming. Within those boundaries, this is a dependable, time-saving spacer to keep in the kit.