The Full Length Sizer Die offers maximum flexibility. It will return brass to factory new specifications. But, if you're loading for the same firearm, the full-length sizing die may be "backed off' to partially resize and retain the fire formed dimensions of the case. All Forster Sizer Dies are equipped with the exclusive E-Z Out Expander. The floating E-Z Out Expander corrects misalignment of the center spindle assembly and prevents the case neck from pulling off-center during the expanding procedure. Shellholder sold separately.Forster