Features: This auto door lock knobs are made of aluminum alloy, light weight and durable in using. The car door lock knob pin can directly replace the original car door pins, also known as the door pins. The car door lock knob is very easy to instell, it can directly replace the original car door pins, directly place into the original position of the car door lock. The auto door lock knobs is a car safety door lock to prevent accident, and the simple design make it practical and beautiful. Our car door lock knob can not only prevent accident but also decorate your car, which is practical and beautiful. Make your car for always in the forefront of city. The interior car door lock knob is made of high quality aluminum alloy material, light weight and durable in using, and has excellent impact resistance and stability. Specifications: Material:Aluminum Alloy Overall Length:Approx. 4.9cm/1.92inch Upper Outer Diameter:Approx. 1cm/0.39inch Lower Outer Diameter:Approx. 0.3cm/0.11inch Color:Black/Blue/Red/Gold/Silver Package Includes: 2pcs Door Lock Pins note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.