Biker Tribal Double Skull Concho Sterling Silver Screw Back is a perfect biker skull snap cover, concho. This Yin Yang design concho will compliment any customised leather design needing a snap cover or rivet. Recommended for Wallets, Belts, Knife Sheaths, Hats, Vests, and more. Any leather crafting project demanding the best in conchos. Another one of the many fine sterling silver Conchos we have in stock. We have brass also and it is shown in the last photos.