Material: Made of high-quality metal material, phosphating heat treatment, with a gray surface. It is wear-resistant, not easily broken, corrosion-resistant, has a long service life, precise processing, and high strength
Package Includes: 4 x 3/8 inch Hub Locking Nuts
Advantages: Deep and complete threads, with even force distribution and not easy to slip
Size: Inner Diameter: 3/8 inch (9.5mm)
Suitable for: Most bicycles with matching lengths, mountain bikes, gears, trainer bikes, bicycle hub axles. A great choice for bicycle enthusiasts