It is Optional 4-Way Cross Wedge. It allows logs to be split 4 ways at once. Get more work done with less effort.
Fits select Boss electric log splitters only
Works with EC5T20, ED7T15, ES7T20 and ED8T20 only
Will not fit Boss 10-Ton (ED10T20) log splitter
Will not fit any other brand log splitter
Slide on, slide off removes easily to go back to regular 2 way split