The Leofoto LB Series Leveling Head with Butterfly Handle acts like a half ball and offers a range of +/-15deg . 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. FeaturesHalf-Ball Type Leveling Capability3/8"-16 Threaded Base Mounting Socket3/8"-16 Tripod Mounting StudCNC-Machined Aircraft-Grade AluminumAnti-Twist Safety Screw DesignWeight 0.88lb