The GRI Industrial Wide Gap Model 4400-A Door Contact Alarm is a robust and reliable security solution designed to protect industrial sites and large entry points. This heavy-duty, surface-mounted contact switch features a rugged, weather-resistant aluminum housing, making it ideal for securing chain link gates, overhead garage doors, safes, and walk-in freezer doors. The kit includes all necessary hardware, brackets, and mounting instructions for straightforward installation. With an impressive standard gap of up to 2.5 inches, this alarm system ensures dependable performance in various applications, providing enhanced security and peace of mind.