Has a strong spring loaded snap gate. Pull and hold trigger to open.Realease and the clasp automatically closed.The silver toned clasps makes a great and touching accessory for him or her.Ideal for key rings, handbag charms.Great item for jewellery making etc.* Material: Zinc metal alloy(Lead and nickel free). * Size: Approx: 37mm x 16mm. * Thickness: 4.3mm.* Color: silver tone (not silver plated) .* This great value pack of lobster clasps, also known as a lobster hook, is a fastener that is held closed by a spring. * The lobster clasp is opened or closed by holding a small lever. * It can be used for keyrings, keyfobs, charms other crafts* Package included: 20 x Lobster SwivelNote:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.