Chaînes d'extension
Extension Chains
Sun Enterprises' wholesale Extension Chains add adjustable length to bracelets, necklaces, and other leather cord jewellery pieces. They connect to an existing clasp and provide extra chain length that the wearer can use to adjust the fit — essential for any design where a one-size closure is not ideal, or where the finished piece is intended for multiple buyers with different wrist or neck sizes.
31 products available across stainless steel, zamak, and brass, with lobster clasp attachment in most styles. Cord sizes from 3mm to 10mm, plus three flat/regaliz-profile sizes (25×4.5mm, 30×4.5mm, 45×4.5mm). Finishes: steel, silver, gold, and rose gold.
Types, Materials & Sizes
- Stainless steel extension chains with lobster clasp (SSP-453 range) — tarnish-free; available in 3mm, 4mm, 6mm, 8mm, and 10mm cord sizes in steel, gold, and rose gold. Priced from €2.25–€3.50 per piece in packs of 5–10.
- Stainless steel extension chain without lobster clasp (SSP-390, SSP-442, SSP-380 ranges) — connector cap style; used where the chain connects directly to an existing clasp loop rather than via a separate lobster clasp. Sizes 3mm, 6mm, 7mm.
- Brass extension chains with lobster clasp (FI7012 range) — silver finish; available in 3mm, 4mm, 6mm, 8mm, and 10mm. More economical than stainless steel; priced from €0.60–€1.00 per piece.
- Brass connector caps (FI7009 range) — a small end cap with a loop rather than a full extension chain; used when only a short extension or a loop connection point is needed. Sizes 4mm, 5mm, 6mm, 8mm.
- Zamak extension chains (FI7012/MGL-282/MGL-227 ranges) — zinc alloy with lobster clasp; sizes from 5mm to 45×4.5mm (regaliz flat profile). Available in silver, gold, and rose gold. Includes three flat/wide-profile sizes for regaliz-style cord or flat leather.
- En rupture de stock
- Nouveau
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.