The ND Series is ANSI/BHMA Grade 1 certified and performs beyond Grade 1 standards. The lock withstands 3,100 in-lb. of lever torque and 1,600 lbs. of offset lever pull for protection against pry bar attacks. The lock shows nearly zero droop or wobble after 16 million cycles. Available in 10 finishes and 9 lever designs. Uses an ANSI 161 door prep, common with cylindrical locks. For new construction and retrofit applications.