This is an Ocean Edge blunt tip dive knife blade made by Hattori for Ocean Edge circa 1980s-1990s. Made with the precision you would expect from this renowned maker, it features a sturdy 3/16" thick satin finished stainless steel blade designed to have the guard slide on from the back and have the pommel screw on to retain the handle in place. It measures 9.75" long overall with a 4.75" long blade. A rare chance to build your own dive knife or replace your old blade. This blade is sharpened and tempered. In unused condition, recently found by Hattori in Seki, Japan.