Introducing the 3 Section Door Jammer with Alarm, Sliding Window and Door Security Bar, ZC035-upgraded. As a factory, we understand the importance of security in your home or workplace. This product provides maximum protection against forced entry by reinforcing doors and windows with its sturdy steel construction. It features a sensitive alarm that goes off when the door is tampered with, giving you added security measures. The sliding window and door security bar can also be adjusted to fit a variety of sizes. This 3-section door jammer is easy to install and use, and offers peace of mind knowing that your property is well-secured.