Pair 3-Prong Claw Round Martini Cocktail Stud Earring MountingsRound 3 prong pre notched claw martini cocktail stud earring mounting features claw prong settings are precisely crafted with metal mold for a finer finish. These high quality semi polished settings are intended for faceted stones. Pre notched claw settings have a vertical groove in the prong setting. The grooves in the prongs serve as a marker of where to place your stone to set it evenly and securely, with enough prong left on top to form the claws