Set up your arm set quickly and easily with just a door and a basic tool kit—no need for professional installation. - Transition Function: This arm set features no lock, making it ideal for areas where peace and quiet are essential, such as cabinets, corridors, consultation rooms, and conference rooms. - Material and Finish: Crafted from durable zinc alloy with a sleek matte black finish, this product combines strength with style. - Compatibility: Designed to fit standard doors ranging from 1-3/8 inches to 1-3/4 inches thick. The handle can be easily reversed for both left and right-handed doors, providing versatility in installation. Please note that the mandal plate is non-removable. - Durability: Built to last, the robust zinc alloy construction ensures a smooth surface and polished appearance, making it suitable for both commercial and residential settings. If it doesn't meet your expectations, we offer a hassle-free refund policy. - Version Upgrade: Enhanced painting technology and round impact plates are now available. We are committed to continuous improvement and customer satisfaction. If you encounter any issues with your order, please reach out for assistance. Experience convenience and functionality with this essential door handle arm set, designed to enhance your space effectively.