This is how you change the maximum speed on your drill. Setting it to "2" makes it so that your drill can operate at its maximum speed, while setting it to "1" cuts that speed roughly in half.

Today, GOLF Top 100 Teacher Joey Wuertemberger shares his “8-4-4” drill that helps dial in speed control on the greens. Three-putting is one of the most frustrating mistakes a golfer can make.