Universal locks, perfect for most sliding doors and windows. Each sliding door locks comes with 2 keys (The keys are universal). Suggested that locks are installed at the top or bottom for maximum security. There are One ways to install these window locks: Punching installation (Hole Caps are provided!). Supplied with security fixing accessories, easy to install and convenient to use. Specification: Material: aluminum alloy Color: black, white Size: as shown The package includes: 1PCS Window Lock Sliding Window Door Lock