Features APPLICABLE RANGE: Suitable for both vertical and horizontal sliding doors or windows EASY OPERATION: No additional tools required METAL STRUCTURE: Sturdy aluminum alloy frame with stainless steel screws MAIN PURPOSE: Provides security for family members 8 SETS SLIDING LOCK: Includes 8 sets for easy installation and added security Specification: Item Type: Sliding Window Lock Material: Aluminum Alloy, Stainless Steel Single Size: Approx. 3 x 2.4 x 2.4cm / 1.2 x 0.9 x 0.9in Applicable Track Height: >1.5cm / 0.59in Applicable Track Thickness: ≤1.6cm / 0.63in Package List: 8 x Sliding Window Locks 8 x Baffles 8 x Wrenches Note: 1. Not applicable to the middle track of the window, please check your window track before purchasing.2. Heavy door or window can be equipped with multiple locks to increase security. Package List 8 x Sliding Window Locks 8 x Baffles 8 x Wrenches