Perfect for DIY jewelry making, hand-made various small ornaments, enough quantity and length give you more possibilities Package Includes: 100pcs extension chains, chain length 47-53mm/ 25mm Long, chain links: 4mm long, 3mm wide, 0.5mm thick.Can be used for a long time, the quantity is sufficient. Material: Made of high-quality 304 stainless steel, smooth, well polished, durable, Not sensitive, no rust, no discoloration, no fading, no deformation, lead-free, the interface will not be loosened easily, don't worry about falling, it is very suitable for jewelry making. Safe to use: The stainless steel color extension chain is hypoallergenic, does not fade, does not deform, does not cause damage to your skin, is sturdy and durable,not easy to break,and can be used with confidence. DIY crafts: Perfect for DIY jewelry making, hand-made various small ornaments, enough quantity and length give you more possibilities, different styles of necklaces, bracelets will be produced in your creation, and send a beautiful copy to those who love it gift. Widely used: The extension chain can be used to make small jewelry, anklets, bracelets, necklaces, office handmade decoration, or to extend some short items, or to repair damaged necklaces. Widely used and convenient to use.