Molded tough, flexible vinyl. Grommets are designed for multiple uses in boats, such as cable pass-thru, landing net holder, fishing rod support or protector, stern light holder, or any number of other uses. For bulkhead pass-thru, simply mount and run cables, wires, etc. through to prevent chafing. For land nets, fishing rods, stern light, or other items, simply mount and insert items to be protected or held in place. To remove items from utility grommet, simply pull. This utility grommet can be used either horizontally or vertically. To install simply cut a 2-1/4" diameter hole and install with four pan-head screws (not furnished).