The Leofoto LB Series Leveling Base with Butterfly Handle acts like a half ball, with the LB-38 mini providing a leveling range of +/-10°, while the other models in the series offer a range of +/-15°. It locks easily and securely in position with a twist of the large butterfly handle at the base of the ball. This leveling base installs on any tripod with a 3/8″ mounting stud.