The Lee Custom Over-Run Bullet Sizer & Punch is a must-have for reloading enthusiasts, offering precise sizing for cast bullets while also seating and crimping gas checks for optimal performance. Designed for use with the Breech Lock Bullet Sizer Kit, it fits any Breech Lock-enabled reloading press, providing versatility and ease of use. To make full use of this system, you will need Lee Liquid Alox, a reloading press and the Breech Lock Loading Kit, which are sold separately. This tool, when combined with the necessary components, ensures smooth, reliable reloading and high-quality results for your ammunition.