Gravity Self-Closing Made Easy w/ Roller Strike Mechanism. Strong, reliable, OEM part. KASON WALK-IN HARDWARE/COMPONENTS ARE THE PREMIUM HARDWARE USED BY OEM (Original Equipment Manufacturer) IN THE WALK-IN COOLER INDUSTRY. KASON HARDWARE IS MADE IN THE USA AND SOLD WORLD-WIDE. THEY ARE RENOUNED FOR DURABILITY AND QUALITY AND WE AT AMTECS USE ONLY KASON HARDWARE ON OUR WALK-IN DOORS TO KEEP UP OUR PREMIUM STD. American Make, Food Service-Industry Standard, OEM component for most. Trouble Free.