Description
ND Series locks have long been regarded as a leading product in the security hardware industry, following in the footsteps of the original cylindrical lock innovation by Walter Schlage in 1920. Known for their exceptional durability, the ND Series is certified with ANSI/BHMA Grade 1 status, exceeding the expectations of Grade 1 performance standards. These locks are engineered to endure significant stress, withstanding up to 3,100-inch pounds of lever torque and 1,600 pounds of offset lever pull to resist pry bar attacks robustly. Beyond their impressive strength, the ND Series maintains remarkable structural integrity, exhibiting virtually no droop or wobble after 16 million operational cycles.
