Roykaus 6pcs Dimmer Switch Knobs, Replacement Universal Dimmer Knob for Ceiling Lights & Wall Switches,PETG Material Split Slider, White,Compatible with Lutron Skylark Fan Control

A simple fix for tired slider switches

A few of my Lutron Skylark dimmers had the same issue many homes eventually run into: the little slider knobs had gone brittle, cracked, or vanished entirely. Rather than replacing whole controls or living with fingernail-only dimming, I picked up the Roykaus dimmer knobs—a six‑pack of push‑on replacements—and tried them across a mix of Skylark light dimmers and a fan speed control. The experience was refreshingly uneventful in the best way: they fit, they look right, and they stay put.

What you get and how they’re made

The set includes six identical white slider knobs. They’re molded from PETG, a material choice that makes sense for this application. PETG tends to be tougher than the brittle plastics you find on older knobs, and it tolerates heat better than common 3D‑print materials like PLA. In practice, that means these should shrug off the warmth that can build around incandescent/halogen loads and resist hairline cracking from repeated use. The finish is clean and slightly satin rather than glossy; close to the sheen of most modern wallplates.

The split‑grip cavity inside each knob is the key feature. It compresses as you press the knob onto the slider post, creating a friction fit that doesn’t require adhesives or set screws. That’s the right approach for Lutron’s Skylark series posts, which are rectangular and designed for press‑on caps.

Compatibility: what they fit and what they don’t

These are best thought of as Skylark‑style replacements. I installed them on:

• Lutron SCL‑153P (LED/CFL compatible Skylark dimmer)
• Lutron S‑600 (incandescent Skylark dimmer)
• Lutron SFSQ‑F (Skylark 3‑speed fan control)

In all cases, the knobs pushed on smoothly and seated with a confident “stop,” aligning correctly with the slider path. The fit felt OEM—neither wobbly nor overly tight.

If your switch is part of the broader Skylark family (models like S‑603P, S‑660PNL, SLV‑600P, SELV‑300P, S‑10P, and similar), you should be in the clear. If you’re running other Lutron lines (Maestro, Diva, Caséta) or a completely different brand with a different slider post shape, these likely won’t fit. They’re also not for rotary dimmers—these are slider caps only. The safest check is visual: if your control has a thin vertical slider track and a small press‑on cap, this is probably the right style; if it’s a dial or a flat rocker without a separate slider, it isn’t.

Installation: a 30‑second job

No tools required, and with the wallplate in place there’s no exposure to live parts. Here’s what worked best for me:

1. Remove any remnants of the old knob. If the old one is stubborn, gently wiggle it side‑to‑side while pulling outward.
2. Align the new knob with the slider post. The internal split helps it flex.
3. Press it straight on until it bottoms out. It should feel snug with no play.

On one older dimmer, the post had a small burr that made the first push a bit stiff. A quick wipe and a second try did the trick. If you find the fit slightly loose on a heavily worn post, a thin wrap of painter’s tape on the post can tighten it up—just keep it minimal so the knob still seats fully.

In daily use

Functionally, the knobs disappear—which is exactly what you want. The tactile ridges make it easy to nudge lighting levels or fan speeds without looking, and the slider action remains as smooth as the underlying control. I didn’t notice any squeaks or rubbing against the wallplate after installation. The knobs track accurately from low to high, and the alignment with the printed scale on the plate (if your model has one) is as good as the originals.

Visually, the color reads as a clean, neutral white. On newer white plates, the match is excellent. On older plates or switches that have yellowed from UV exposure or age, these will look brighter. That’s not a knock on the knobs; it’s the reality of pairing fresh plastic with aged plates. If color uniformity is critical across a room of well‑aged plates, consider replacing the plates at the same time or look for an “almond” or “ivory” variant—this set is white only.

Build quality and durability

PETG was a smart choice. After several weeks of daily use, the knobs show no whitening at stress points, no hairline cracks around the split, and no looseness developing. PETG’s resilience gives you a bit of flex during installation, which helps avoid the brittle failures that older caps can suffer. Heat resistance also seems adequate: I tested on a couple of dimmers driving incandescent loads, and while the plate grew warm, the knobs themselves stayed stable with no softening.

Finish quality is consistent across the six pack—no flashing, sharp edges, or discoloration in my set. The edges are lightly rounded, so there’s nothing to catch skin or clothing.

What could be better

• Only one color: White will please most, but there’s no almond/ivory or black option here. Mixed‑color homes may need to source different sets.
• Not truly universal: The “Skylark‑style” fit is excellent, but if you’re hoping for a one‑size‑fits‑all slider cap, this isn’t it. Measure or visually confirm your post shape.
• No labeling or instruction card: Installation is obvious, but a quick compatibility diagram would save a return or two.

None of these are deal‑breakers; they’re more about setting expectations so you get the right piece the first time.

Tips for getting the right fit

• Match the style first. If your control looks like a Lutron Skylark with a narrow vertical slider, you’re in the right neighborhood.
• Check post shape. Rectangular post with a press‑on cap? Good sign. Round or keyed posts usually indicate a different ecosystem.
• Consider your plate color. Fresh white caps on aged plates will stand out. If that bothers you, plan for new plates at the same time.

Value

A six‑pack makes sense. Most homes have more than one Skylark control, and even if you just need one or two knobs today, having spares in the junk drawer is handy. Compared to replacing entire dimmer assemblies—or living with controls that are hard to operate—this is a low‑cost, minimal‑effort fix.

Who they’re for

• Homeowners with Lutron Skylark dimmers or fan controls missing or cracked slider caps
• Property managers looking for a quick, tool‑free refresh across multiple units
• Anyone who wants an unobtrusive, OEM‑like replacement without swapping the entire switch

Who should skip:

• Those with non‑Skylark controls, rotary dimmers, or smart dimmers without a separate slider
• Anyone needing colors other than white

The bottom line

The Roykaus dimmer knobs do exactly what I needed: restore full function and a clean look to a set of Skylark dimmers and a fan control, with a snug fit and a material that feels like it will last. Installation is as straightforward as it gets, the appearance blends well with modern plates, and the six‑pack provides sensible value and spares.

Recommendation: I recommend these if you’re replacing missing or broken slider caps on Lutron Skylark‑style dimmers or fan controls. The fit is secure, the PETG construction is durable, and the white finish looks clean. Just double‑check that your switches are Skylark‑style and be aware that the bright white may contrast with aged wallplates. If you’re outside that compatibility window or need a specific color match, look for a different set; otherwise, this is an easy, reliable fix.