Description The PROOF Founder key holder is built on an aerospace-grade aluminum frame with top-grain leather panels. Up to seven keys stack inside the frame and pivot out one at a time, so the set carries flat rather than loose on a ring. Top-Grain LeatherLeather panels on the outer faces, which darken and soften with handling rather than staying uniform. The frame underneath is machined aluminum. How It CarriesKeys swing out from the stack individually and fold back flush. A clip is integrated into the body, so the holder sits against a pocket edge instead of swinging from a ring. Designed by former U.S. Marine Corps Reconnaissance Marines turned engineers. Covered by a lifetime guarantee: if it breaks or fails, it is replaced. Spec Frame: aerospace-grade aluminum Panels: top-grain leather Capacity: up to 7 keys Integrated pocket clip Maker: PROOF, designed by former U.S. Marine Corps Reconnaissance Marines turned engineers Warranty: lifetime, covering breakage and failure