The prison doors are installed underground. An important issue to note is that they must be moisture-proof (to prevent mold damage) and waterproof. The underground sections often regain moisture during the rainy summer months, increasing the requirements for the prison doors, especially in terms of materials. Above ground, since it's the underground part, there's no need to pay attention to appearance; just ensure the quality is hard enough. Naturally, when considering wood, it's best to disregard it. The door must be made from metal or other non-absorbent materials. Before installing the prison doors, check if the door opening size meets the requirements of the manufacturer. If there are irregularities that need to be addressed before installation.

Additionally, inspect the door for any deformation, dents, loss, or damage during transportation. If any of these issues are present, they must be addressed before installation. After the manufacturer's installation, the door should ensure that the gap between the door leaf and the door frame is even, with no warping, tilting, or rebound defects. Once closed, the door must open freely without any jamming or noise.

Stainless steel (corrosion-resistant steel) prison doors and copper doors are both finely crafted, with a strong adhesive finish to prevent easy peeling and offer robust protection.

Books with after-sales services, such as pre-sales, in-sales, and after-sales situations for prison gates, are clear at a glance. This is to better avoid disputes caused by intermediaries and to provide better service to customers.

After-sales service includes years of after-sales support or lifetime service.

During the warranty period, if the product itself is defective, the merchant is responsible for repairs and replacements. If deemed damaged or misused, the merchant will charge a production cost.

Prison doors can be prison doors, and they can substitute for other prison doors, but the prison door within a room cannot replace a prison door, as prison doors are typically made of heavy, thick iron. However, a prison door can also be a hidden door or an artistic door, meaning that the door of a prison can be replaced with murals or wallpaper. After the prison door manufacturer has installed the door, they check if the door frame and top sill have moved or deformed, if the door leaf opens freely, if the lock operates smoothly, and if the door leaf fits snugly with the frame, ensuring the gaps are even.