Cleaning a single heavy dumbbell to the shoulder and driving it overhead for maximum weight tests one-sided power and shoulder stability at the same time. Without a second dumbbell to balance against, the core and traps have to work harder to keep the torso from twisting under the load.
Log your strongman dumbbell one arm clean and jerk weightlifting max sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.