INDUSTRIAL GRADE QUALITY: Made with high-impact resistant ABS and PVC plastic materials. Our window and door jammer provides robust strength that withstands repeated impacts. Compatible with window alarms for added security. Has a double locking pin. AFFORDABLE HOME SECURITY: Our window & slide door lock is a low-price solution to protect your home. Unlike expensive security systems that don't physically stop intruders or accidents, we provide instant, physical protection with no fees. SET IT AND FORGET IT: Forgot to lock up? No worries—our sliding window security bar is your silent security guard who is always on duty. This sliding door lock bar helps prevent accidents, keeping your kids, pets and elderly at home safe! SAFE VENTILATION: With longer, hotter seasons & rising energy costs, open your windows with confidence knowing you're protected. Don’t be a prisoner in your own home—safely enjoy the breeze day and night with this window & sliding door security bar. QUICK & EASY INSTALLATION: No tools required. Install our window bar lock with no drilling or permanent damage to your frames. This window bar extends from 17 inches to 2.5 feet with 13 adjustable settings, a reliable alternative to wooden blocks. The Lock-it Block-it is a reliable, affordable solution for protecting your home, family, and loved ones. We have never increased our prices despite the cost challenges of inflation, tariffs and rising delivery costs. Unlike expensive security systems that cost thousands and require complicated setups with monthly fees, we offer high-impact, industrial-grade physical security (ABS & PVC plastic) at one low price with no hidden costs. Our unique, double-headed locking pin adds extra security strength. As seasons grow warmer and energy costs skyrocket, our window security bars allow you to open your windows for fresh air with total confidence, effectively blocking intruder access while allowing for safe ventilation. This adjustable, tool-free security device features customizable settings suitable for various window types—including single-hung, sliding windows, and patio doors. We supply strong adhesive strips that keep the device firmly in the window track making it a superior alternative to bulky wooden blocks or heavy metal devices that can cause injuries. It acts as a silent security guard for households with curious pets, children, or seniors with memory concerns, preventing accidental falls and offering an extra layer of protection that can be easily removed in emergencies. Designed for apartments, houses and rental properties, the Lock-it Block-it provides immediate, reliable security that you can simply "set and forget," ensuring your home is always protected. It doesn’t block your view so you don’t have to feel like a prisoner in your own home.