Two Estate type 8" backplates with Depression Crystal Knobs and Surface Mount Hardware to Install on any solid surface from the front side. Old Fashion customer service (not outsourced) Phone number included Superior cosmetically and enhanced engineering Matching Passage set on Amazon item B00CEN2TZA Surface mount installation system for Both sides of one door or One side of two doors Assembled and tested in the USA - Matching Passage set is available on Amazon B00CEN2TZA Guaranteed to your satisfaction, Unconditionally