Self-Locking Gravity Door Lock: Our lock is made of sturdy steel with high quality black zinc alloy. It is corrosion resistance. The length of the latch bar is 4.57 inches. The length of the pull rope is 15.75 inches. New Opening Design: This door latch adds an ingenious piece of metal that fits inside the latch that attaches to the handle. Thanks to the spring and this feature, the latch closes securely every time. Double Door Design: Designed for security Simple yet sturdy for inward and outward swinging doors and gates, featuring fingertip self-closing, can also be operated with a cable or wire rope. Upgraded Durable Material: Longer and stronger screws to help secure the latch deeper and more securely. The operation of the latch is smooth and simple. Widely Used and Versatile: It can be widely used on wood (garden, porch, farm, orchard, yard, deck, shed, ranch, baby gate, fence, pool gate, barn door, carport, livestock, dog house, sheep pen, pet house, animal pen), etc.