2 colors, gold and silver. Gold is gold fill Silver color available by special order. Just contact seller. 1 beautiful charm enhancer/clasp* with dotted detail To use: Hold ball end with wrapped jewelry pliers (so you won't scratch). Hold end with hole with your other hand. Snap the ball into the hole using the jewelry pliers or your fingernail. To open it is sometimes easier to hold one end with wrapped jewelry pliers. They are supposed to fit tightly. See my video in the pictures. Multiple uses: ✔️Charm enhancer ✔️Connector ✔️Necklace building Gold plated over brass/silver is rhodium plated Measurements: 15.65mm outside (includes dots) 9.86 inside Ring is 2mm Nickel free and solid! Perfect size and width Great for necklace "building" A must have for all jewelry makers Gold polished alloy over brass Sturdy and works well- it opens easily and snaps back into place Necklaces shown are not included. They are for idea purposes only! You may find most of the chain and pendants in my shop Avoid wearing jewelry in water. Keep away from all chemicals, perfumes and lotions. Polish with a clean dry cloth. Store in a cool dry place and avoid wearing to bed.