Doors thickness :1-3/8 inch 1-3/4 inch(35mm to 45mm) Backset :2-3/8"(60MM) or 2-3/4"(70mm) Functicn:ET(Entrance),BK(Privacy),PS(Passage) ,ST(Storeroom) COLOR SELECTION:Antique Brass Stainless Steel AC Antique Copper MB Matt Black