Look at the force demand and aesthetics. Ordinary furniture assembly or cork fixed, with blue-white zinc-plated wood screws can be, low cost and not easy to rust. Hexagon socket countersunk head screws (SHCS) are recommended for stair handrails, heavy shelves, or metal connectors that require high appearance flatness. Its advantages are: large tightening torque and strong anti-loosening ability; after screwing, the head is flush with the surface of the workpiece, it will not protrude and bump like the outer hexagon, and the inner hexagon wrench is not easy to slip, suitable for operation in a narrow space.