▸ The shape of the safety bolt latch is perfect and noble, and will not affect the appearance of the door and the layout of the entire room, making it more fashionable. ♪Narrow lock frame keeps the chain in a fixed position when the doorstop is not in use, avoiding door/frame damage caused by hanging the chain ♪Welded twisted steel chain to match the door panel and chain bracket. ♪ This lock door protector is a safety lock device that allows the door to open slightly for safe viewing and ventilation ♪Designed for hinged entry doors that swing inward to enter the residence ▸ It cannot be unlocked from the outside to ensure your safety.