V-shaped flat hinges with a thickness of 1 inch and 0.5 inch, using a single M5x60 SHCS and nut. The hinge cover and the head of the SHCS are glued together. The nut slides into the nut groove inside the handle. The handle is used to tighten or loosen the hinge, allowing or prohibiting angle adjustment of the V-shaped flat hinge, and even allowing adjustment of the hinge friction force between locking and unlocking.