Box One Single Speed Chromoly Cogs
Box One Single-Speed Chromoly Cogs are CNC-machined from long-wearing CNC-machined from chrome-molybdenum. It's designed to fit Shimano™ compatible cassette hubs and has a 5mm wide inner base, giving a more solid interface with the cassette body.
What can you say about a Chromoly Cog? Good fit and finish, they work and most importantly, BOX ships your order the same day (unless you are ordering outside of business hours). If you get in a tuff spot, you can always use it as a Chinese throwing star.
Awesome, good looks, and tough as nails.