• Track Lockring By Halo , 7075 CNC Alloy. 2 notch. L/H 24T in Anadised Gold
• Halo Fixed Cog Lockrings: Precision CNC machined. 2 dog type. L/H thread - 1.29"x24T Weight: 7g
• General Fixed cog check: for correct fixed use, the fixie cog should NEVER move on the hub when pedal force is applied in both directions.
• This will keep your fixie from slipping as it is essential for safety
• i.e. if the cog moves, then something is wrong. Continued 
• use with a fixed cog that moves will result in damage to the hub.