Discover the ultimate in home security with our Door-in-Door Single Door – a modern two-in-one solution that combines style and safety. With dimensions of 900x2100x90mm, this secure steel door boasts a unique design featuring grille and transparent ventilation mesh. Enjoy peace of mind with 7 sets of non-duplicable keys, a communication grille mini door, and a top-notch locking system with 9 security locks strategically placed at the top, bottom, and front. Customize your entrance with unique door frames and decor.