This lid organizer will fit the Condition 1 #179 case model. Instructions are included when you receive the product. Please double check that your lid has the required mounting bosses/holes on the inner portion before purchasing. *This lid organizer is not recommended for the 4 Pistol Pre-Cut #179 case. It works best with the 2-pistol, 3-pistol, pluckable foam, and padded divider options.  *Case Not Included