SUPERIOR ANTIQUE DESIGN: Victorian style Hand-Turn Twist Mechanical Doorbells chime are the best way to announce a guest’s arrival by making a delightful and charming sound. A Vintage Charm - Impress house guests with the antique look of this decorative door bell chime. It flaunts ornate details on its surfaces and stands out with its polished oil-rubbed bronze finish This door bell fits doors up to 2 1/4 in thickness. It comes with the necessary hardware needed for installation, like screws (1 extra). Spindle may be cut to desired length. It gives off a classic ringing sound when its handle is twisted, signalling the arrival of your guests in style. EASY DIY INSTALLATION - Includes installation hardware such as high-quality screws (1 extra). For fixing screws on any wooden surface, mark and drill pilot holes with a drill bit appropriate for the mounting hardware. It flaunts ornate details on its surfaces and stands out with its polished oil-rubbed bronze finish. PRODUCT DIMENSIONS The exterior turn piece measures 5 3/8 x 3 3/4. Mechanical Doorbell Brass Wireless Doorbells For Home A29 Victorian - Solid Brass Twist Door Chime, Non-Electric Wireless Antique Twist Doorbell Vintage Doorbell For Metal surfaces other suitable screws must be used. A29 Wireless echanical Twist Doorbell, Victorian Style Solid Brass... A Sure Fit - Our wireless door bell may be installed on wooden or metal doors that measure up to 2., 25 thick. Craftsman Twist Mechanical Doorbell, Oil-Rubbed Bronze Refer to the images section for installation instructions.