Fang Buttress (64°41′S 63°21′W / 64.683°S 63.350°W / -64.683; -63.350) is a rock buttress immediately west of Molar Peak near the south end of the Osterrieth Range of Anvers Island, in the Palmer Archipelago. The buttress has a small but prominent tooth-like rock in front of it and is a landmark for parties crossing William Glacier. It was surveyed by the Falkland Islands Dependencies Survey, 1955–57, and given this descriptive name by the UK Antarctic Place-Names Committee in 1959.^[1]