This includes all tooling for the Universal AR-15 fixture codes. That includes the 1/4" end mill, 1/4" Collet, small end mill (for milling the selector, trigger, hammer and for the FFL 07/02's, potentially the auto sear pin hole) and small collet. The size for the small end mill hasn't been officially decided as an 1/8" would potentially not allow for milling the auto sear hole, but is more rigid and robust than a smaller end mill would be.