IMPRTANT SIZING INFO: If the hole on your piece of jewelry is more than 1/16" bigger than the size stated above or the bar on your piece of jewelry is more that 1/16" shorter that the length stated above: this piece will not work for that piece of jewelry. The bars on the extender and your piece of jewelry should slip into one another without any pressure being applied: if you try to force a bar into a hole, you may damage your piece of jewelry. This product fabricated in Colorado USA by KaShDa's Jewelry of imported components. This product has tested to be nickel free and meets or exceeds the requirements of California Proposition 65 for lead content in Class 2 items, plated jewelry items. All pictures shown are stock photos/scans. We will custom craft any item(s) for you, therefore they may vary some in color or link shape of any chain.