Product Description
The Arrow MK31 is a Grade 2 communicating function cylindrical knob — both knobs can be locked independently. Used between rooms that need optional separation. The MK series delivers commercial-grade quality at a price point that makes sense for apartment buildings and light commercial projects where Grade 1 is overkill.
DD knob in 605 bright brass. Standard 2-1/8" bore prep, 2-3/4" backset. Fits 1-3/8" to 1-3/4" doors. Non-handed. BHMA A156.2 Series 4000, Grade 2, UL listed. Note: knob hardware does not meet ADA — for accessibility compliance, use the RL lever series instead.
Lock Depot sells brand new Arrow Lock products with the full manufacturer warranty.
Warranty Information
1 years limited manufacturer's warrantyProduct Videos
Custom Field
Series MK
Mount Type Cylindrical
Cylinder Conventional
Color Bright Brass
Trim DD
Key Function Communicating
Function Knob
