High Quality: Made of quality stainless steel material, precision casting and durable, longer service life. Safety Application: Safety Windows locks for children, keep curious toddlers away from windows, doors, etc. Avoid accidental opening of children accidentally window Simple Installation in Seconds: Easy to install, without any additional tools. Each safety lock comes with a key. Compact Size Design: You can take the security slide stopper with you for a travel or business trip, providing you with self protection. Safety Essential Good Helper: Suitable for families, hotels, schools, and girl travelers. Protect the kids, elders, and even pets in your family. Also can prevent the theft to come into your house. Specification: Material: Aluminum Alloy Size Chart: Screw: 9mm/0.35inch Handle: 24mm/0.94inch Single Hole Lock: 24x24x30mm/0.94x0.94x1.18inch Double Hole Lock: 24x24x60mm/0.94x0.94x2.36inch No Hole Lock: 68x24x31mm/2.68x0.94x1.22inch Package Includes: 1 Set Window Locks Stopper(10 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!