These skeleton keys are usually designed with hollow shafts, allowing them to open doors with pin tumblers inside. They are made of solid brass or die-cast zinc, and are finished with various surface treatments, making them sturdy and durable. Replacement ant keys used for old style cabinets. Such as cabinet doors, grandfather clocks, dresser drawers, chinese cabinets, old document boxs and secretary desks. skeleton keys kit for . Convenient to Use: The skeleton key includes KY-3AB, providing more opportunities to try to open . It saves the unnecessary fee of hiring a maintenance worker to come to your home. Selecting the correct skeleton key to open old-style cabinets or drawers is not a simple process. It requires great patience, luck, and repeated attempts.