10 Pcs Stainless Steel Very Strong Extension for Chain Necklace End with Clasp Extender Extenders Curb Lobster Sterling silver tone Necklace Extenders Chain 10 pcs chain necklace extenders With a 8mm spring ring clasp attached Each measures approximately 58 x 2.5 mm (L x W) made of stainless steel , it is hard to break this extender. Please feel free to contact us if you have any questions. Please do not leave us negative feedback. This item bring us few profits.Thanks