Standard Grommet Pliers, size 1 grommets, 5/16 diameter hole.This size pliers is best used for Goshawks large, Red tail hawks male or female/ Harris hawk size raptors.These handy grommet pliers will do a quick clean job of setting the grommets on your birds next pair of anklets. This will also keep your bird and you from stressing out during handling. Just hood your bird and then put the anklets on, it will be just that easy. All of our grommet pliers now come with the new rubber handles that make them much easier to use. 533 Size 1 grommets.5/16 diameter hole. $39.95We now include a free pack of grommets with each pair of grommet pliers ordered this size.