Function: The front door knobs have a small turning knob on one side to lock the door and a lock and key mechanism on the other side to the door. Durable: The sturdy construction of these door handles allows them to be strong, strong and long-lasting. Sturdy knob design prevents breakage and breakage that can occur with inferior mortise door handles. The chrome finish adds a stylish touch to your home or office. Security: These chrome door knobs provide extra security with the lock and key mechanism. They are ideal for offices, bedrooms and interior porch doors as they provide optimum security. Application: These door latches can be used on interior or exterior doors that are 35" thick. at 45mm. The tubular latch is adjustable to 60mm or 70mm (the distance between the center of the hole and the edge of the door). They are suitable for commercial and domestic use. Contents: 1 door lock and 3 keys Features: Function : Entry door knobs feature a small twist knob on one side to lock the door and a lock and key mechanism on the other side of the door. Durable : The sturdy construction of these door handles allows them to be strong, strong and durable. Sturdy knob design prevents breakage and breakage that can occur with inferior mortise door handles. The chrome finish adds a stylish touch to your home or office. Security: These chrome door knobs provide extra security with the lock and key mechanism. They are ideal for offices, bedrooms and interior porch doors as they provide optimum security. Application: These door latches can be used on interior or exterior doors that are 35" thick. at 45mm. The tubular latch is adjustable to 60mm or 70mm (the distance between the center of the hole and the edge of the door). They are suitable for commercial and domestic use. Contents: 1 door lock and 3 keys. Specifications: Material: stainless steel. Colour: silver. Dimensions (L x W): approx. 170 x 75 mm. Center distance: approx. 60 mm (typical A), 70mm (type B). Suitable door thickness: approx. 35-45mm. Contents: 1 door lock. 3 keys. Note: 1. Due to the lighting and individual monitor settings, the item's color may be slightly different from the pictures. 2. Since measurements are taken by hand, the dimensions indicated may vary by 0.5 to 2 cm.