The Leofoto LB Series Leveling Base with Butterfly Handle acts like a half ball, providing +/-15° of leveling range capability. 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. The anti-twist safety screw design uses three set screws on the platform to secure the ball head in place on top of the leveling base. Specifications: Adjustable Tilt Range: +/- 15°Half-Ball Type Leveling Capability3/8"-16 Threaded Base Mounting Socket3/8"-16 Tripod Mounting StudCNC-Machined Aircraft-Grade Aluminum Leofoto LB-60N 60mm Quick Adjust Horizontal Head Leveling Base LB-60N