The ND Series has been redesigned to make it the strongest cylindrical lock Schlage has ever built
No access with minimum 3,100 in-lb abusive lever torque — the equivalent of over 690 lbs applied to the end of a 4 1⁄2" lever (2.6x BHMA requirements1)
No access with minimum 1,600 lbs offset lever pull for protection against pry bar attacks
(8x BHMA requirements1)
No access with minimum 100 vertical impacts1,2 for protection against sledgehammer attacks (20x BHMA requirements1)
Near zero droop and wobble after 16M cycles (16x BHMA requirements1), without the use of set screws or O-rings
Latch retraction with 200lb preload for confident operation in warped and preloaded doors
(4x BHMA requirements)
1. Beyond grade 1 performance for ND locks with Schlage cylinders only (standard, FSIC & SFIC). Performance with non-Schlage cylinders will exceed BHMA grade 1 requirements but may be less than the performance of products with Schlage cylinders.
2. Vertical impact testing stopped after 100 blows with no sign of failure or stress.