The Lee Case Trimmer Cutter with Ball Grip helps to make cramped fingers and fumbling with the Lee metal cutter a thing of the past. The Lee Cutter with Ball Grip is made to fit ergonomically in the palm of the hand making case preparation with Lee case length gauges easy and more comfortable. Notes: This is just the ball grip and cutter. A lock stud is still needed to use Lee Case Length Gauges. Lee does not sell just the lock stud so a Lee Case Trimmer Cutter and Lock Stud (Item 476-992) is needed to properly use this item.