Specification: 6.5/8.5mm(for single/double speed);
1.silver bolts: Usually , It’s Given when you buy the cank
2.colorful bolts: Titanium plating , more rust-proof durable, cool fashion
3.Easy to install,which is convenient to use.
4.Commonly used on mountain bikes for two-piece disc locking.
5.Lightweight, tough and durable, it can be used for a long time.
6.The titanium plating color of each chainring bolts will be a little different.