The Studica Robotics 6mm D-Shaft Servo Hub 25T is made of anodized 6061-T6 Aluminum and is used to connect a servo motor to a D-Shaft axle.

The Studica Robotics Servo Pack - Hex Shaft is a complete servo motor and hardware bundle designed for robotics builders, educators, and competition teams. This all-in-one set includes eight multi-mode smart servo motors, a smart robot servo programmer, a 6 V battery holder, a servo power block, multiple servo mounting plates, servo horns, and 6 mm Hex-shaft servo hubs — giving you everything you need to integrate servos into robot mechanisms, linkages, and control systems.