Grix Genuine Billet Aluminum Sunglasses are carved from 6061T aircraft-grade aluminum, and feature designs inspired by the chrome side trim of the classic '57 Chevrolet and the flamed hot rods of the '50s and '60s. Other designs borrow from a chromed V8 fender badge and explore new machining techniques available from today's CNC machine centers. All Grix sunglasses are limited editions, with every pair individually numbered.