A drill rig mast, also known as a derrick, is a tall and sturdy structure that provides vertical stability and support to drilling operations. Made of steel, it withstands the forces and vibrations generated during drilling, enabling safe and efficient drilling processes. The mast houses the hoisting system for raising and lowering the drill string and equipment, as well as the power system for rotational force. Its height can vary, and it plays a critical role in maintaining stability, control, and safety in various drilling applications.