Cressi Borg, Long Blade Diving and Spearfishing Knife Cressi is a REAL diving, snorkeling and swimming Italian brand, since 1946. Japanese 304 stainless steel blade, blunt tip version One side of the stainless steel blade is straight-edged, the other one is serrated right along the blade It is separated from the blade by a small techno polymer thumb tab Sheath with locking mechanism to allow one-hand release