Shop Keepers Bells have been around for generations; and for good reason. They work well and produce a pleasant tone in the store or office. Easily adapted to doors that open in or out, installable either on the door, on the inside door frame or above the door. Many clients use their imagination with string or wire to activate this bell in different situations. The bell is cast brass and the spring steel used holds its shape under constant use. Brass screws provided.