High Quality Material: The door reinforcement plate is made of durable 201 stainless steel. Resists rust and deformation. Provides long-lasting performance. What You Will Get: Package includes 4 stainless steel deadbolt cover plates and 1 paper cardboard box. Sufficient quantity for replacement and use. Size Information: Door reinforcement plate measures approximately 130x90x1mm, with a 55mm hole. Paper cardboard box measures approximately 130x110x17mm. Proper dimensions to meet standard requirements. Function: Helps secure a loose or unstable door lock. Firmly anchors the door handle to the door and covers wear marks or scratches from prolonged lock use. Simple and Quick Installation: Attach the cover plate to the back of the door handle. Easy to install and provides a strong, secure fit. High adhesion ensures durability and reliability.