All of solid door handle sets are Precision-engineered, and it is suitable for Steel Door,Fire rated Door, Wooden door,Entrance door, Metal door, interior door of commercial or residential application.The material can be Stainless steel SS304,SS316 etc . With SS304,SS316 Escutcheon and Rosette, 8x8x100 mm spindle, Brass insert and fixing screws. These solid door knobs are made with high quality. Our solid lever handles come Standard with a quality Guarantee and are 200,000 tested to ensure maximum security.