A grommet or eyelets are rings or edge strips inserted into a hole through a thin material, typically a sheet of textile fibre, sheet metal or composite of carbon fibre, wood or even honeycomb. Eyelets are generally flared or collared on either side to keep them in place.

What are the different types of eyelets?

There are four common types of eyelets, and they include:

Punched
Webbing
D-Ring
Hooked

What are eyelets made out of?

Eyelets are mainly made of a few commonly known materials, such as:

Metal
Plastic
Rubber


What is the purpose of an eyelet?

Eyelets are used to reinforce the hole or to shield something from the sharp edges of the hole, as the hole may not be blunt. They're rings that are used as reinforcement for a spot in fabric or paper.

Where are eyelets used?

Eyelets are used in standard household applications such as:

Curtains
In thread cords
Laces
Tongues of buckle
Bags