Lee 223 Breech Lock 3-Die Set includes colored Smart Lock Bushings for easy die identification Full Length Sizing Die Easy Adjust Dead Length Bullet Seating Die Factory Crimp Die Universal Shell Holder Powder Dipper and Instructions/Load Data.This die set may be used to load 5.56 NATO (5.56 x 45mm) brass. You must follow load data published for the 5.56 NATO available from your favorite powder maufacturer.