Catene di estensione

Why Are Extension Chains Used?

• Adding adjustable length to leather cord bracelets — essential for designs where the buyer's wrist size is not known in advance
• Extending necklace length for different wearing styles without replacing the full cord
• Providing an adjustment range on finished bracelet designs sold online or through retail, where a single size must fit multiple customers
• Used in production alongside clasps, end caps, and cord to create fully adjustable jewellery sets

Why Order From Sun Enterprises?

Sun Enterprises has:

• Full material range — stainless steel (tarnish-free, premium), zamak (decorative finishes), and brass (economical production)
• Cord-size specific — sizes match standard leather cord diameters (3mm–10mm) plus regaliz flat-profile options (25×4.5mm, 30×4.5mm, 45×4.5mm)
• Multiple finishes — steel, silver, gold, and rose gold to match your clasp and components
• 40+ years of wholesale experience — established 1985, shipping to 55+ countries

Related Blogs

How Do You Attach Clasps to Leather Cord Jewelry?
A full clasp attachment guide — covers the complete workflow including where extension chains attach in the finished piece and how they connect to the lobster clasp or end cap.

How to Attach Magnetic Clasps to Jewelry: A Step-by-Step Guide
Covers the attachment process for magnetic clasps — extension chains are commonly added to the ring end of a magnetic clasp to provide size adjustment.

How Do You Fasten a Leather Bracelet?
Covers fastening options for leather bracelets — discusses how extension chains provide an adjustable fit across different wrist sizes and wearing preferences.

Choosing the Right Findings for Jewelry Making: A Complete Guide
Covers all findings including extension chains — useful context for buyers understanding how extension chains fit into a complete jewellery construction workflow.

Frequently Asked Questions

How does an extension chain work on a bracelet?
An extension chain is a short length of chain — typically 3–6cm — attached to one end of the bracelet. The clasp on the other end of the bracelet clips into any link of the extension chain, allowing the wearer to choose their preferred fit. It is most commonly used with lobster clasp or spring ring closures.

What cord size should my extension chain match?
The extension chain's inner channel size should match the diameter of your leather cord. If your cord is 6mm, use a 6mm extension chain. The cord end inserts into the chain's cord cap, which is then glued in place. For regaliz flat leather, use the 25×4.5mm, 30×4.5mm, or 45×4.5mm zamak options.

What is the difference between an extension chain with a lobster clasp and a connector cap?
An extension chain with a lobster clasp has both a cord-end connector and a lobster clasp built into one piece — the lobster clasp is the adjustable end that hooks into the chain links. A connector cap (FI7009 range) is just the cord-end cap with a loop — you need to attach your own extension chain and clasp separately.

Do extension chains need adhesive?
Yes. The cord end inserts into the cap of the extension chain and is secured with jewellery adhesive. Follow the same technique as attaching a standard end cap. See our blog How to Finish Leather Cord Jewelry Ends Professionally for detailed technique guidance.

Do you ship internationally?
Yes. We ship to 55+ countries. See our shipping page for delivery times and rates.

Order Extension Chains

Browse out full Findings, Beads, and Charms here. Also, check our extension chains in stainless steel, zamak, and brass across all cord sizes and finishes, or contact our team for bulk pricing. Combine with our jump rings, links and connectors, and leather cords in one order. We ship worldwide from Almere, the Netherlands.