These spring loaded case guides directly replace the factory manual adjust Frankford Arsenal X-10 case guide with no modifications needed and improve case centering in the shell plate for the priming position. 
 
Our spring loaded case guides eliminate the need to manually adjust the case guide mounted on the priming assembly per case diameter. 
 
The Light blue guide has an added nub to better hold smaller cases like .350, 9mm, 223 and 300BO.
 
The Dark blue case guide is for larger case diameters.
 
Included:
1 Light Blue (SMALL) case guide
1 Dark Blue (LARGE) case guide