I put these chains together in my studio and to my knowledge no else is offering sterling silver SNAKE chains with this unique friction clasp which allows for easy switching of beads with 2.5mm or larger holes! The image of multiple chains shows them in 18, 20, 24, 30, and 36 lengths. I can also make them custom lengths such as THIS LISTING FOR A 26" length chain. This listing is for Sterling Silver Snake Chains that are 1.5mm in diameter with a sterling silver tube friction based bayonet clasp. The clasp itself is 2.2mm thick and measures 60mm (about 2.5 inches) long and is slightly curved. It works great with one nice center piece focal bead in the middle and one can add charms or other beads with larger holes on either side if desired! This is my all time favorite chain!!! This kind of clasp will easily slide through the bead holes in MOST of my beads with a 3mm drill hole, or larger. If you want a chain for a specific bead you’ve purchased you can ask me to check to be sure. Some drill holes may be smaller or long and straight, and the curved tube may not fit through ALL of my beads, although I strive to make all my beads “bayonetable” if possible. The clasp is very secure and can be made more secure by just putting a tiny bit, ever so slight, more curve in the bayonet part of the clasp by carefully and gently bending it with your fingers. It’s pretty easy to put the two ends together too. The only thing to be aware of is to grip the CLASP ITSELF when opening and closing the neck chain. Do not pull on the snake chain itself to separate the clasp. While the chain is strong and securely anchored in the clasp, where the chain connects with the clasp is also the part of the chain that is already subject to the most stress. I’ve worn one of these daily with HEAVY beads on it for years and haven’t had a problem. Chains can be made to order in any length. One can certainly find snake chains in this length cheaper on eBay, but NONE with the SPECIAL bead-interchanging CLASP!