HARD TO FIND…This is a completed round catcher and a empty case bin for a Dillon’s 550 with a strong mount system.. the whole thing as pictured mounts to the 3 holes in the right side of the Dillon’s 550.. works very well catching the finished rounds being ejected out.. and also holds in the forward bin your empty cartilage cases for easy placement on to the press.. all bolts and bins are included.. all you need is the 550 strong mount using the existing holes.. FREE SHIPPING