I complimented the perfect avocado slices on a dish Mom made once and she showed me a tool she'd gotten for just such purpose. I *squeee*ed and she said she'd pick one up for me, which she did. the loop end helps you pop the pit out of the center, and the little harp end is strung with taut wire for slicing perfect wedges of the soft fruit.
This avocado slicer is a marvel. I tried to find a video for it, but I couldn't. Anyway, you'll have to trust me on this one. Is fabulous.