The Same-kiri Bochi is a large zanbato, with a design similar to a cleaver, with string tassel tied at the pommel of the handle.
Bastille likely earned his epithet "Shark Cutter" by his sword. However, the blade was broken the first time it was shown being used, so its abilities are unknown.
When Sabo was preventing the Marines from going after Luffy during Doflamingo's Birdcage game, Bastille attempted to attack him with his sword. Sabo subsequently grabbed Bastille's weapon and shattered it with Ryu no Kagizume.