1. Wide application: this headset star nut is a universal bicycle accessory, widely suitable for bicycle front forks with an outer diameter of 28.6 mm, and its size is 2 x 2 x 1.5 cm / 0.8 x 0.8 x 0.6 inches, which can widely meet the needs of most bicycles specification. 2. Steel alloy material: this bicycle headset star nut is made of highquality steel alloy material. It is lightweight, strong and durable, has good performance, is not easy to deform, is not easy to damage and can be used for a long time. 3. Easy to install: the installation of this bicycle headset star nut is very convenient and simple, no professional requirements are required, simply install this toothless core headset into the front fork tube and then screw the front fork to the frame, which can save your time and energy. 4. Professional design: this bicycle replacement star nut weighs 55 grams, has a high strength, light weight, high precision, stable performance, high reliability, easy and convenient to use, and is an excellent replacement for old and damaged nuts.