Door frame employ steel plate, dignified and elegant, texture clear ; double rim To strengthen the security ; Enhanced than chain, and enhance security of 4; To strengthen the structure of double-lock, anti-theft performance even more remarkable ;The use of professional manufacturers to produce AB lock, two keys to lock it (B as decoration key, A key for the owner), owner occupancy with the key A key turning laps B shall immediately be invalidated, so that more secure locks; The threshold for the use of a full stainless steel material, in the long-term use does not rust, so that your family into the door so decent Forever.