Features APPLICABLE FIELD: single hole sliding window lock set, suitable for vertical or horizontal sliding doors or windows, which is safe and reliable. EASY TO USE: No additional tools required. Each window lock is equipped with an allen key and the lock can be attached to the rail with a key. METAL STRUCTURE: With aluminum alloy frame and stainless steel screws, the sliding window lock has a sturdy structure, stable and durable. MAIN PURPOSE: This lock is suitable for most environments, keeping the window open and closed, providing security for family members. 8 SLIDING LOCK SETS: Includes 8 sets of sliding window locks, easy to install and adjust. Multiple locks can be added for extra security. Specification: Item Type: Sliding Window Lock Material: Aluminum Alloy, Stainless Steel One size: approx. 3 x 2.3 x 2.3 cm/1.2 x 0.9 x 0.9 inches Applicable rail height: >1.5cm/0.59inch Applicable rail thickness: ≤1.6cm Package List: 8 x Sliding Window Locks 8 x Deflectors 8 x Wrench Note: 1. Does not apply to the central window rail. Please check the window track before purchase.2. Heavy doors or windows can be equipped with multiple locks to increase security. Package List 8 x Sliding Window Locks 8 x Baffles 8 x Wrenches