Which ones do you use ?
Used on fabric to strengthen where you will put holes.
Some uses include Sails, Dodgers bags etc
They come in different sizes and metals.
Nickel Plated - Nickel plating provides a unique combination of corrosion and wear resistance.
Check the size you need or if you are replacing old ones you can measure the internal diameter.
Dont forget to look at how much material will be clamped between the grommets and measure the height of the eyelet to see if it will be deep enough.
There are lots of tools to help you to put these on and range in price.