Pandahall 420pcs/box 6 Color Iron Fold Over Crimp Cord Ends Terminators Clamp End Tips with Loop fit for 3mm Thick Leather Silk Ribbon Jewelry Findings 6x3mm;

These tiny crimp beads are perfect for fine chains with tiny links, no link, thin cords, threads and etc.

First insert the end of the chain / cord onto the U-shaped tube and gently press down with jeweler's pliers. You can also use glue for extra security.