Feature 1 IMPROVE SECURITY: Use this lock to prevent slipping of sliding window and door and increase the security, which are perfect for horizontal or vertical sliding door and window. 2 WIDELY APPLICABLE: The window lock with a length of 2.4in, fits tracks up to 0.4in wide (with rubber cushion) or 0.67in wide (without rubber cushion). Please measure your track before installation to ensure a proper fit. 3 EASY SCREW IN DESIGN: Using double screws to secure the lock onto the track, this sliding window lock is easy to install with a hex wrench (included) and does not require any additional tools or complicated installation. 4 RUBBER CUSHION: With rubber cushions included, the window stopper minimizes the possibility of scratch or damage to your window. 5 STURDY ALUMINUM ALLOY: Made with aluminum alloy, the sliding window lock is highly sturdy and maintains maximum durability and stability.Item Type: Sliding Window LockMaterial: Aluminum AlloyApplication: Used for vertical and horizontal sliding window and sliding door, etc. Package List18 x Sliding Window Lock Accessories1 x Key