In rugby, the locks play a crucial role in the scrum, providing the power, stability, and structure that hold the pack together. Positioned in the second row behind the front row, they bind tightly and drive forward to generate force while helping maintain balance and shape. Their job is not only to push but also to support effective coordination between the forwards, making the scrum stronger and more controlled. Understanding what the locks do offers valuable insight into how a scrum functions and why these players are so important to the game.