The steel ring was designed primarily to be used with all sleeved post Cable Bullet kits. It slides up under the Bullet head and over the fitted rubber o-ring. Once installed, the steel ring will help cover and seal the larger hole required in post sleeves and protect the sleeve from the cutting edge on the back side of the Bullet head. The rubber o-ring serves as a cushion against the steel ring which allows you to set the desired angle of the set screw channel without damaging the post sleeve. 

Steel rings may also be used with metal Cable Bullet kits as a decorative accent. 

Steel rings are machined from 316-grade stainless steel.