I have two ham presses of different types.
The 1st is a loaf pan as illustrated that was passed on to me for making formed type hams from trimmed pieces. It is also good for making scrapple and other luncheon loafs.
The second is an open wire ham press which I use to make hams from boneless pork butts. This presses them during smoking and keeps the meat secured so it does not open on the cuts during cooking