Features: The Aluminum Sliding Window Security Lock offers no drill installation with quality aluminum construction, providing reinforced security against forced entry while maintaining window ventilation capabilities. Featuring a steel thumbscrew and adjustable design, this 4 pack set secures fit metal sliding window with rail up to 3/16" wide, ensuring reliable performances across various window types. Ideal for homeowners with children or pet owners, these lock prevent accidental window openings while allowing controlled airflows for enhances indoor safety. Perfect for residential and commercial applications, the corrosion resistant aluminum lock maintain clean sightlines while securing sliding window in both closed and partially open positions. The silver design complements modern window frame without obstructing view, offering discreets yet effective security against unauthorized access through horizontal sliding window. Specifications: Material: Aluminum Alloy Color: Silver Optional Types: A Single Hole, B Double Hole Size: As pictures shown. Package Includes: 4pcs Sliding Window Security Lock note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color the item.