1Angle Measuring: By measuring the angle, the drive angle gauge can measure the exact torsion of 1/2in male and female square drive. 2Easy to Adjust: The adjustable arm keeps the angle scale still, and holds the rod to ensure that the meter is in place during use. 3High Accuracy: With 0 to 360 degrees measuring range, the angle meter also has a high accuracy up to 2 degrees, very easy to use. 4Flexible Using: The arms are available in two lengths to provide you with additional flexibility when resting against the components. 5Simple Cleaning: Easy to disassemble and clean, just loosen the snap ring to clean, and the good materials will simplify cleaning.