4 Sizes Brass Foldover Clasp: This includes 4 sizes of clasps each size has 4pcs a total of 16pcs Sufficient quantity and a wide range of sizes can meet your various needs for use you can use it to adjust your necklace bracelet make the length more suitable and beautiful Folding Extender Clasp: This folding clasp is designed with connecting rings at both ends you can easily use it to connect your necklaces and bracelets just open the protruding part at one end to unlock it it is very easy to put on and take off Size and Content: There are 4 sizes of this silver folding clasp the sizes for the 15mm and 16mm lengths are 3.5 x 15 x 4mm (0.14 x 0.59 x 0.16in) 6.5 x 16 x 4mm (0.26 x 0.63 x 0.16in) and the two sizes for the 17mm length are 4.5 x 17 x 4mm (0.18 x 0.67 x 0.16in) 7.5 x 17 x 4mm (0.30 x 0.67 x 0.16in). Come with plastic box x 1pc Brass Material: This folding clasp is made of high quality brass feels good and comfortable lightweight and durable Wide Applications: This fold watch clasp can be widely used at the end of your crafts to help you adjust the length of your necklaces bracelets and watches he will be a great ending accessory choice