I have several. These are two I use. The yellow handle one is heavy and the blades are well past the rim so it cuts cleanly. Made by Wilton.
The black one is adjustable and has a cap for the blades, made by AMCO. Can be set for 8 or 16 segments. The segments vary just a bit in width but unless you are really picky, it is not a problem.
The core cutter in the yellow one is smaller so occasionally there will need to be some cleanup of some seed case left in the slices. I just spread them out on the cutting board and use a measuring spoon with a round end.