Spyderco's signature round hole in the blade allows for easy one-handed opening, and the frame has been cut out of titanium with a single-piece construction. Unlike some 'dog tag' folders or box cutters, the Squarehead's low-profile blade does lock into place by means of a frame lock bar, which also houses the detent ball that holds the blade in its closed position. The whole Squarehead has been treated with a gorgeous stonewash finish.