Made from high grade stainless steel with a 4mm thickness, and natural resistance for long lasting outdoor security. 3 preset holes (7.5 inch model) or 4 holes (9 inch model), allowing flexible positioning to fit various gate styles and post thicknesses. Smooth sandblasted oxidized surfaces provides elegant touches, similar to premium electronics, while ensuring durability against wear and weather. Compatibility with sliding/swinging doors, double gate, fences, barns, sheds, garages, and more—ideal for gardens, driveway, stables, and patios. Includes all necessary hardware for straightforward installation; simply aligns, marking drill points, and secure with 8 screws for reliability protecting.