What Is a Grommet Tool? Types, Sizes, and How to Install Banner Grommets
A grommet tool installs a reinforced ring around a hole in vinyl, fabric, canvas, leather, or another sheet material. On banners, the grommet distributes the force from rope, hooks, or ties so the material is less likely to tear at the attachment point.
A complete grommet usually consists of a male barrel and a mating washer. The tool compresses the two pieces together around a properly sized hole.
Types of Grommet Tools
Hand Pliers
Pliers are portable and inexpensive. They work for light-duty repairs or small quantities but can produce inconsistent pressure and limited throat depth.
Hammer-and-Anvil Setter
This kit uses a punch, die, anvil, and mallet. It is affordable and can create strong installations when used on a stable surface, but it is slower and noisier.
Bench Press
A manual lever press provides repeatable alignment and pressure. It is the practical choice for sign shops and anyone installing many grommets.
Automatic or Pneumatic Press
Production equipment increases speed and consistency for high-volume banner finishing. Correct dies and safety procedures are essential.
Common Grommet Sizes
Grommet sizing systems vary by manufacturer, so always match the grommet, washer, cutter, and die as a set. In banner production, a 3/8-inch inside diameter is common, but smaller and larger sizes may be appropriate for lightweight displays, heavy rope, or specialty hardware.
How to Install a Grommet
- Reinforce the edge. Fold, weld, tape, or hem the banner as appropriate before placing the grommet.
- Mark the center. Keep holes a consistent distance from the edge and from adjacent grommets.
- Punch the correct hole. Use the cutter matched to the grommet barrel. An oversized hole weakens the installation.
- Insert the barrel. Push the male grommet through the face side of the material.
- Add the washer. Place it over the barrel on the back side in the correct orientation.
- Align the dies. Center the assembly in the setter or press.
- Apply controlled pressure. Compress until the barrel rolls securely without splitting.
- Inspect the result. The grommet should sit flat, rotate minimally, and have no sharp edges.
How Far Apart Should Banner Grommets Be?
Spacing depends on banner size, material, wind, mounting method, and duration. Two to three feet is common for many routine banners, with additional grommets at corners. Exposed outdoor banners may require closer spacing, reinforced hems, or alternative mounting. Grommets do not make a banner windproof.
Common Installation Mistakes
- Punching the hole too close to the edge
- Using a die that does not match the grommet
- Installing through unreinforced thin material
- Crushing the barrel with excessive pressure
- Leaving a loose grommet that spins or pulls free
- Relying on corner grommets alone for a long outdoor banner
Frequently Asked Questions
Is a grommet the same as an eyelet?
The terms are sometimes used interchangeably, but grommets are generally more substantial and often use a washer, while an eyelet may be a lighter one-piece fitting.
Can I install grommets without a tool?
Not reliably. Improvised methods can deform the ring, leave sharp edges, and weaken the material.
Do all banners need grommets?
No. Pole pockets, sewn loops, webbing, keder edges, and frame systems may be better for certain installations.
Bottom line: A good grommet installation depends on matched components, reinforced material, correct spacing, and controlled pressure. For finished custom banners, browse the North State Signs banners and display collection.