Function: Front door knobs feature a small turning knob on one side to lock the door and a lock and key mechanism on the other side. Durable: Sturdy construction ensures strength and long-lasting performance. The robust knob design helps prevent breakage commonly seen with inferior mortise door handles. The chrome finish adds a sleek, modern touch to homes or offices. Security: Chrome door knobs offer enhanced security through a reliable lock and key system, making them suitable for use on office, bedroom, and interior porch doors. Application: Designed for use on both interior and exterior doors with a thickness of 35mm to 45mm. The tubular latch is adjustable to 60mm or 70mm (measured from the center of the bore hole to the edge of the door). Ideal for residential and commercial applications. Features: Entry door knobs include a twist knob on one side for locking and a keyed lock on the opposite side. Constructed for durability and security. Specifications: Material: Stainless steel. Color: Silver. Dimensions (L x W): Approx. 170 x 75 mm. Center distance: 60 mm (Type A), 70 mm (Type B). Suitable door thickness: 35–45 mm. Contents: 1 door lock, 3 keys. Note: Due to lighting and monitor settings, color may vary slightly from images. Hand measurements may vary by 0.5 to 2 cm.