Features: Made of stainless steel, rust-resistant, wear-resistant and corrosion-resistant. The surface is smooth and does not scratch the hand. OOTDTY  Installation is simple, just use the included screws to fix it. Countersunk head screw holes and unique end hook design, the hook and eye buckle are firm and will not automatically unlock even when pressure is applied. It prevents toddlers and pets from sneaking out of the room, providing you and your family with extra security. Cabin hooks are suitable for most windows and doors such as barn doors, shed windows, bathrooms, sheds, blinds. Specification: Material: Stainless SteelStyle: Silver 3 Inches/silver 4 Inches/silver 6 Inches/silver 8 Inches/black 3 Inches/black 6 Inches3 Inch Size: Approx. 75x39mm/2.95x1.53inch4 Inch Size: Approx. 100x36mm/3.94x1.42inch6 Inch Size: Approx. 150x39mm/5.90x1.53inch8-inch Size: Approx. 200x39mm/7.87x1.53inchPackage Includes: 1x Cabin Hook(with Screws)note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.