Pretty much everything is in this pack to account for almost a full rotation of adjustment! - Precision Reflex 5/8 inch Internal Diameter Spacer Shim Pack

I was able to clock my muzzle device with this kit. It REALLY helps to have some sort of Vernier or mic gauge to figure out the thickness of each one, and then using a shim tool to measure the gap you're going to need to fill on the muzzle side. Even with a nice gauge - I still had to guess and check plenty of times and torque, loosen, retorque to get the final alignment correct. Don't forget your Rocksett! I used this to clock a suppressor capable muzzle brake and would recommend this set for the application!