Easy to Install - Each window lock comes with a hex key, allowing secure attachment to the track without the need for additional tools. Designed for horizontal and vertical windows, as well as sliding glass doors. Not suitable for plastic window frames.Durable Material - Constructed with a strong aluminum alloy frame and stainless steel screws for long-lasting use. Features solid build quality and precise craftsmanship.Wide Usage - Helps keep windows partially open or fully closed, enhancing home security, preventing unauthorized access, and helping prevent children from falling. Promotes improved air circulation while maintaining safety.Color: Silver, Yellow Material: Aluminum Alloy Small Size: 3 x 2.4 x 2.4 cm Large Size: 6 x 2.4 x 2.5 cm Package Contents: 6 x Sliding Window Locks (with hex key) Note: The actual product color may vary slightly due to lighting conditions and screen display differences. Measurement error is +/- 1-3 cm. Only the items listed are included.