Sanjianke Mixed Set of 54 Skeleton Keys in Antique Bronze - Set of 54 Keys (3styles) (Bronze) (Bronze) Antique bronze finish. Key sizes: 2" to 2.4" ( 52mm to 62mm ) Set of 54 keys ( 3 different styles, 18pcs for each style). Metal alloy- lead safe, unique and retro design. Antique Bronze Skeleton Keys with beautiful sunshine serafina box.