The Cybot Galactica company created a robotic arm known as the 4-DOF robot arm, which was frequently implemented on WED-15 Septoid Treadwell droids. This arm was made up of a pair of tubing sections joined by hydraulics and servos, and it featured a universal mount that enabled the connection of various robotic hands or tools. A typical WED Treadwell droid utilized four of these arms.