Size:1/4" Kit General Tools 71260 Grommet Kit with 48 Grommets, 1/4-Inch From the Manufacturer Our Utility Grommet Kits provide an economic solution for repairing tarps, tents, awnings and pool covers. Each easy-to-use set includes a hardened steel hole cutter, a matched mandrel/anvil pair, a hardwood backer block and an assortment of grommets. We offer three kit sizes (1/4, 1/2 and 3/8-inch) as well as the option to purchase additional grommets.