Automatically activates dispensing a charge with every pull of the handle only when a case is present in the station. Plus it works with our new Lock-N-Load bushings. You can remove and change Hornady or other rotary-type powder measures with a quick turn, without changing adjustments. Easily adjusts for any charge you are loading. Designed for the new Lock-N-Load Automatic Progressive loader, but also fits most other brands of loaders.