DM-6688D/SC/MC Product specification Standard : ANSI/BHAM A156.2-2003 Grade3, A156.5-2010, A156.36-2010 Operating cycles : 200,000 Cycles of Closing and Opening Backset : 60-70mm Function : Entrance Door Thickness : 35-45 mm Material : Solid Zinc Alloy Finish : Mat & Satin Chrome Corrosion resistance : 96 hrs Salt Spray Test Cylinders : 5-pin ANSI Type Deadbolt Cylinder Keys : 3 pcs of Nickel Plated Brass Key or Dimple Key Patented Handle Style Design Series Name : 6688 Material : Solid Zinc Alloy Finish Code : Mat & Satin Chrome DM-6610 AB DM-6680 AC DM-6700 SS