Discover the reliability of the United Security Products USP 240 Twist Loc Magnetic Contact. This compact 1/4" x 1/2" device is expertly crafted from precision-machined metals, ensuring durability and a perfect fit. With a 0.375" gap, it offers optimal performance for secure installations. The contacts are lightning-resistant up to 1.0 amp, providing robust protection against electrical surges. Its unique twist lock feature allows for easy installation and removal, making it ideal for regular testing and maintenance. Ensure your security system's integrity with this closed circuit, high-quality magnetic contact. Upgrade your safety measures today!