Easy To use: The spring open ring clasps are quipped with the opening inside. You can make it open with gentle force and make it move off. When you release your pressure, the opending will closed again. 15 Pcs In A Box: There are 15 pcs spring open ring clasps. You can receive them in a box that is finished well. And you can use these smooth surface clasps to make jewelry for yourself or friends. Size: the bracelet clasps are about 13mm . With 3mm holes on different sides of round eadge, you can use its holes to go through the leather or connect other crafts. It is suitable size. Material: These bracelet clasps are made of brass. The material make this clasps can be used in daily life. You will be amazing about their platinum surface and love its strong construction. Practical: This spring open ring clasps can tightly connect your jewelry. And they are mainly used as a connector in bracelect and necklace with chain and jump ring. You can also use them only to connect if you like.