Bright Silvery Mechanical Door Stopper Keep doors secure and protected with a fully automatic mechanical door stopper designed for durability and simple onehanded operation. Key benefits Instant locking with builtin spring damping absorbs impact and prevents door damage. Fully automatic operation: push the door once to lock, push again to release. No manual unlocking required. Strong loadbearing capacity reduces the risk of doors moving or closing unexpectedly in wind or traffic. Adjustable bolt length fits door gaps up to 0.78 inches, making it suitable for a wide range of door types and narrow frames. grade alloy construction with electroplated finish for rust resistance, low maintenance, and longterm toughness. Features and performance Color and finish: Bright silvery electroplated surface for a clean, durable look. Mechanism: Instant lock design with spring damping to absorb shocks and protect door edges and frames. Compatibility: Works with heavyduty doors and narrowframe doors where bolt adjustment is needed. Bolt extends to accommodate gaps up to 0.78 inches. Ease of use: Fully automatic locking and unlocking by pushing the door, eliminating the need to bend down or use tools during normal operation. Durability: Constructed from grade alloy and tested for reliable mechanical performance under repeated use. Practical applications Apartment entry doors where wind or hallway traffic can cause doors to slam shut. Office meeting rooms and conference areas to hold doors open for short periods while maintaining a secure lock when needed. Heavy exterior or service doors that require a robust stopper and adjustable bolt to match varying frame clearances. Quick operation guide To lock: push the door gently until the stopper engages and the bolt sets automatically. To unlock: push the door again to disengage the bolt and allow the door to close or move . Adjust the bolt length to match the gap between the door and floor or frame, up to 0.78 inches. This mechanical door stopper provides reliable automatic holding power, impact absorption, and adjustable fit for a range of door setups while maintaining a clean bright silvery finish.