PACKAGE INCLUDES - 1 window retainer with screws. Suitable for all common plastic, wood, or metal windows and doors. STURDY AND DURABLE - Our window stays are made of high-quality metal, resistant to rust, strong, and durable, designed for long service life. EASY INSTALLATION - Window locks are easy to install. Each window opener comes with screws; a simple screwdriver is all you need for installation. No drilling required. SAFETY PROTECTION - Suitable as a safety lock for children and pets. Provides a secure locking system for tilt-and-turn and inward-opening windows. Allows safe ventilation and fresh air intake. APPLICATION - Compatible with various sliding and casement windows, helping to secure window openings. Note: Measurements are manually taken; please allow a 1–3 cm variation. Color may vary slightly due to lighting and display differences. Actual product may differ slightly from the image.