The Redding TR-1400 Case Trimmer is a great trimmer for reloaders looking for an accurate trimmer that will meet most trimming needs. The cutter is held stationary for maximum rigidity while the case is turned. The trimmer features a sturdy cast iron from, universal collets, adjustable cutter shaft and coarse and fine adjustments up to 0.001". The titanium nitride surface treatment on the replaceable cutter head help to ensure maximum life. This collet is required for reloaders wanting to use their Redding TR-1400 case trimmer for trimming 470 Nitro Express Cases.