Latches Hinged entrance door designed to swing inward for entry ♪Easy to install and operate; can't be unlocked from the outside, easily unlocked from the inside ♪ Allow the door to be opened slightly for viewing ♪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.