Grommet set/strong grommet set with 10 pieces of 16 mm grommets plus an installation tool. The grommets are suitable for things like rope pass-throughs in sails, making and reinforcing attachment holes in tarps and covers. The ring is attached to the material by hammering it with the installation tool in between, so the ring secures to the material being attached and creates a 16 mm hole for threading ropes or hooks, for example.