Dritz 44436 Square Curtain Grommets, Matte Black, 1-Inch, 8-Pack These square grommets customizes window treatments and shower curtains Reinforce the area around a hole cut into any type of fabric or plastic, no more fraying Allows the user to easily attach the fabric to items such as rods or poles, for costums, clothing and purses Fit rods up to 1-3/8-Inch and work on sheer to drapery-weight fabrics Available in matte black color and grommets measures 1-inch inner diameter