Features: *Exposed installation protective sleeves: The door knockers are wire extension protectors that can be easily installed on door frames, providing a reliable and convenient solution for wiring. *Neat and attractive results: With these protective sleeves, the wiring remains organized and visually appealing, enhancing the overall aesthetic of the installation. *Prevention against intentional damage: These exposed door knockers effectively prevent wires from being intentionally broken or torn, ensuring the integrity and functionality of the electrical . *Cooperation with access control projects: Wire protectors can be used in conjunction with security access control projects, enabling the installation of electric locks, door sensors, and alarm switches on the door. *Easy installation and beautiful appearance: By passing a wire through the door gap and clamping it onto the door frame, these protective sleeves not only prevent damage but also offer easy installation and a sleek, attractive appearance. Specifications: *Product Name:Exposed installation protective sleeves *Material:Stainless steel *Size:201 size: about 422*8mm, metal tube size: 400mm, inner diameter: 6mm, 301 size: about 422*8mm, metal tube size: 400mm, inner diameter: 6mm *Color:silver Package Content: 1 x access control wire crossing device Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Exposed installation protective sleeves: The door knockers are wire extension protectors that can be easily installed on door frames, providing a reliable and convenient solution for wiring. Neat and attractive results: With these protective sleeves, the wiring remains organized and visually appealing, enhancing the overall aesthetic of the installation. Prevention against intentional damage: These exposed door knockers effectively prevent wires from being intentionally broken or torn, ensuring the integrity and functionality of the electrical . Cooperation with access control projects: Wire protectors can be used in conjunction with security access control projects, enabling the installation of electric locks, door sensors, and alarm switches on the door. Easy installation and beautiful appearance: By passing a wire through the door gap and clamping it onto the door frame, these protective sleeves not only prevent damage but also offer easy installation and a sleek, attractive appearance.Specifications: