Tnisesm 135Pcs 8 Sizes Nylon Plastic Hole Plugs Black 1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 7/8" 1" Round Drill Hole, Furniture Cabinet Insert End Caps Industrial Hardware Biscuits & Plugs

A small kit that solves a lot of small problems—that’s how I’d sum up the Tnisesm hole plug kit. If you build, fix, or modify anything with panels or furniture, having a range of press-fit plugs on hand saves time and cleans up the final look. I put this 135-piece, eight-size set to work across a few projects—covering cabinet screw holes, tidying appliance panels, and plugging automotive bumper holes—and came away impressed with the utility, with a few caveats around sizing and storage.

What you get

The kit includes 135 black nylon plugs across the most common fractional sizes. My set broke down as:
- 1/4 inch: 35 pieces
- 5/16 inch: 30 pieces
- 3/8 inch: 20 pieces
- 1/2 inch: 15 pieces
- 5/8 inch: 10 pieces
- 3/4 inch: 10 pieces
- 7/8 inch: 10 pieces
- 1 inch: 15 pieces

They arrive in a transparent plastic box. In my case, the plugs came grouped in small zip bags inside a single-compartment box. It keeps everything together, but it’s not as convenient as a divided organizer. Plan on labeling the bags or transferring to a compartmented case if you want faster size selection.

Build quality and design

The plugs are made from RoHS-compliant nylon. In practice that means they’re lightweight, slightly flexible, and resistant to everyday wear. The head surface is smooth and the edge is consistent enough to look clean on visible surfaces. The retention ribs—the small concentric rings that create friction in the hole—are pronounced and do the heavy lifting. They bite enough to hold securely without requiring tools for installation.

Nylon is a good choice for general indoor use, light automotive applications, and many outdoor spots that aren’t constantly sunbaked. After a few weeks on a bumper and a fence post, I didn’t see fading or brittleness. Long-term, nylon without specific UV stabilization will not outlast dedicated exterior caps in full sun for years, but for most uses it’s more than adequate.

The face profile is low and reads “finished” rather than “temporary patch.” If you’re aiming for invisible, remember these are black; they look best against dark surfaces or where a contrasting dot is acceptable.

Fit and sizing

These plugs are sized by nominal hole diameter—match the label to the hole size you drilled. That said, reality is messy. Hole diameters can vary based on drill bit wear, material, and technique, and different panels can be slightly out-of-round. Here’s what I found:

• The ribbed design gives you a little forgiveness. Slightly rough or imperfect holes still accept the plug and hold well.
• If your hole is on the tight side of nominal, a quick deburr or a light chamfer makes installation smooth.
• If your hole is on the loose side, stepping up one plug size often solves it, but the head may sit a touch prouder. Measure with calipers if the fit is critical.

Across the set, I occasionally had to choose the next size up for a snug fit in plastic and composite panels. In wood and metal drilled accurately to size, the labeled size worked as expected.

Installation and removal

This is a tool-free system, which is the whole point. For most materials:
- Press in with thumb pressure. A soft mallet helps for larger plugs, but avoid striking the head directly with a steel hammer.
- A hint of soapy water can ease tight fits in plastic panels without affecting long-term hold.
- For removal, a trim tool or plastic pry pick under the head pops them out without marring the surface.

I appreciated how quickly they transform a hole from “unfinished” to “done.” In cabinets and appliances, the difference is immediate.

Where it worked well for me

• Automotive: Plugging front bumper license-plate holes on a car that no longer needs them was straightforward. The plugs sat flush and stayed put through city driving and a car wash.
• Furniture and cabinets: Covering leftover shelf-pin holes and unused mounting points created a cleaner look, especially in darker casework.
• Appliances and panels: Factory service holes on a black appliance door disappeared neatly.
• Boat and RV trim: In fiberglass liners and plastic panels, the ribbing took up minor hole variability and still held securely.

Where to use caution

• Electrical boxes: These are simple cosmetic plugs, not listed knockout seals. Don’t use them to close active electrical enclosures that require code-compliant covers.
• High-heat areas: Nylon softens at elevated temperatures. Avoid engine-bay hot zones or surfaces near exhaust components.
• Bright exterior finishes: On white or light cabinetry, black plugs will obviously contrast. You can paint nylon, but use a plastic adhesion promoter or primer; rattle-can enamel alone doesn’t bond well to nylon.

Durability and holding power

Retention is solid. In vertical and overhead orientations, the ribs maintained tension without creep. In a few thin, flexible plastic panels, a dab of clear silicone under the head created a belt-and-suspenders hold for vibration-prone environments, though it wasn’t strictly necessary. Impact resistance is good; I intentionally bumped a few with a tool bag and didn’t knock any out.

I didn’t notice flashing or molding defects that would interfere with fit. Heads stayed scuff-free with normal handling.

Practical tips

• Measure the hole: A quick caliper check avoids guesswork. If you only have drill bits, match the hole to the bit size and choose the same labeled plug.
• Prep the edge: Lightly deburr or chamfer metal and hardwood holes to prevent shaving the ribs on insertion.
• Test on scrap: For visible surfaces, try one plug in an offcut to judge fit and appearance before committing.
• Keep a removal tool handy: A nylon pry tool or guitar pick slides under the head cleanly if you need to swap sizes.
• Organize the kit: Rehome the plugs to a divided box with labeled compartments to speed up selection on the job.

Value

Buying individual bags of a single size can add up fast. This assortment covers the sizes most people encounter, and the piece count skews smartly toward the smaller diameters you’ll use most. If you routinely work with only one size (for example, 3/8 inch grommet holes in a specific product line), dedicated bulk might make sense. For general shop, garage, and household use, the assortment wins on versatility and cost per plug.

My only functional grievance is the storage box. A divided organizer would make this perfect out of the gate. As delivered, it’s fine, just not optimized.

What I’d change

• A compartmented box with size labels would elevate day-to-day usability.
• Including a simple size chart with head diameter and recommended panel thickness range would help pros match aesthetics and fit more precisely.
• Offering a neutral white or paintable gray variant would broaden interior design use.

None of these are deal-breakers, but they’re areas for polish.

Recommendation

I recommend the Tnisesm hole plug kit for anyone who frequently finishes panels, furniture, or light automotive work and wants a reliable, no-frills way to conceal holes. It’s a practical assortment with solid build quality, secure press-fit retention, and sizes that cover most needs. Expect occasional size adjustments based on real-world hole tolerances, and plan to upgrade the storage for faster workflow. If you can live with those minor compromises—and especially if black matches your surfaces—this kit earns a permanent spot in the shop.