These are Lobster Claw Clasps, Parrot Trigger Clasps.
The pliers on lobster head? That's right! Brass Lobster Claw Clasps.Brass Lobster Claw Clasps, Parrot Trigger Clasps, Nickel Free, GoldenSize: about 12mm long, 7mm wide, 3mm thick, hole: 1mm.Look, What are these like? Because of unique structure philosophy, Lobster Claw Clasps, Parrot Trigger Clasps tightly buckling your jewelry, which are not easy to loosen, prevent loss and damage of your jewelry.