FEATURES: • Meet ANSI grade 3 specification • 200,000 Cycle Turns Tested • Stainless Steel or Solid Brass Construction • ISO 9001: 2015 Quality Standard • Premium Quality Material • 60-70mm (2-3/8” to 2-3/4”) Backset • Fit doors 35-50mm (1-3/8” to 2”) Thickness • Key operated outside , thumb turn inside • Elegant Matte Black Finish Also Available in Bathroom Function: • C312-MB - without keys