Product Dimensions:20 x 20 x 2 cm; 100 Grams Number of pieces:2 Batteries required:No 2 x non-slip aluminum alloy sliding window lock with key sliding door lock for children. Specifications: Product Name : Aluminum Alloy Sliding Window Lock Material: Aluminum Colour: silver. Double hole size: 6 x 2.2 cm. >Double hole size: 3 x 2.2 cm. Quantity: 2 pieces Package: PVC bag. Character: Designed for horizontal/vertical window and sliding French doors, keep children safe Each window lock has an internal hexagon with a key and can be tightened by turning the hex key to the right. Both are used to hold the window lock closed or allow partial opening Great hand feel, ideal for mixing and dispensing No need to install and disassemble with additional tools, easy and convenient to install and disassemble. Package includes: 1 x Single Hole Sliding Bay Closure 1 x Double Hole Sliding Bay Closure High quality: made of aluminum alloy and stainless steel which is both sturdy and durable Size:Single Hole Limiter, 3 x 2.3 x 2.2 cm Double hole limiter, 6 x 2.2 x 2.2 cm > EASY INSTALLATION: No punching installation, card installation, no punching, easy replacement, no other tool installation. Safety: To prevent children from accidentally falling off, avoid accidental opening of the child's window Wide application: sliding w windows locks can be easily applied to most environments, such as window doors, glass sliding doors, sliding windows in hotels, residences, hospitals, schools and offices to provide children a safe environment. High quality: made of aluminum alloy and stainless steel which is both toughy and durable Size:Single Hole Limiter, 3 x 2.3 x 2.2 cm Double hole limiter, 6 x 2.2 x 2.2 cm EASY INSTALLATION: No punching installation, card installation, no punching, easy replacement, no other tool installation. Safety: To prevent children from accidentally falling off, avoid accidental opening of the child's window Wide application: sliding window locks can be easily applied to most environments, such as window doors, glass sli ding doors , sliding windows in hotels, residences, hospitals, schools and offices to provide children a safe environment.