High Security Knob Sets Commercial Locks > Door Knob/Lever Sets > High Security Knob Sets    crescent - weiser lock GRADE II Knobsets meet the highest residential ANSI A156.2 grading requirements, surpassing rigorous 400,000 cycle tests – Grade II. ADJUSTABLE LATCH Knobsets include an adjustable latch for 2-3/8” (60.32mm) or 2-3/4” (69.85mm) door backsets. 4-POST SHIELDED CONSTRUCTION Knobsets feature a four-post, shielded chassis design for ease of installation and maximum security against prying or kick-in attempts.