The Hornady Lock-N-Load AP Progressive Press Automatic Case Feeder Sub-Plate Conversion Kit is designed for use with your Lock-N-Load AP Progressive Presses with serial numbers 6999 and lower. The Sub-Plate is required if you want to operate the Lock-N-Load Automatic Case Feeder with the older serial number presses. Not only does this conversion kit allow you to attach the Lock-N-Load Automatic Case Feeder (not included), it also upgrades your press to the EZ-ject cartridge ejection system, which delivers 100% reliable cartridge ejection. Function: Converts non EZ-ject presses to be EZ-ject compatible Notes: Kit does not come with instructions. The instructions for use of the kit are in the automatic case feeder operation manual.Kit comes with Sub-plate for press and attachment hardwareOnce updated to the EZ-ject system the press will require EZ-ject compatible shellplates, as earlier versions are not compatible with the EZ-Ject system. To tell if shellplates need to be updated tu...