I used these grommets for a curtain project to cover my laundry area, an oversized closet right off the kitchen. I first ordered one package and tried it on my fabric with a variety of interfacings to see what worked best for the fabric/grommet combination. I was really pleased to see that the grommets worked well with the light polyester fabric, clicking together very firmly, and, with the aid of a small screwdriver, popping apart. The trick is that the hole that needs to be cut for the grommetSee full review