Mechanic Wrench Cross Skull Ring — Solid .925 Sterling SilverGrease under your nails, a torque wrench in one hand, and a ring that actually looks like it belongs on someone who works for a living. The Mechanic Wrench Cross Skull Ring is a solid . 925 sterling silver skull ring built around the one symbol every gearhead recognizes crossed wrenches behind a detailed skull face. At 19 grams, it's the kind of piece best for riders and mechanics who want jewelry that tells their story without saying a word. Who This