This is a Casefeeder Crud Catcher for Dillon XL650 XL750 Casefeeder. The Dillon Casefeed has two holes in the bottom back of the bowl assembly. These holes allow any accumulated spent powder, polishing media or general crud to drain out of the bowl. This crud if left unchecked can fall all over your press or bench top. Most reloaders just tape some kind of cup or even a couple of spent shell casings to the back of the feeder to collect the debris. This upgrade accomplishes the same thing in a more elegant manner. The Base Mounting Riser Bracket is printed on a 3D Printer and the stacks are clear polyethylene tubes so you can see when they need to be emptied.