Lateral Raise.

Side delts, strictly speaking.

The arm pads lift from the elbow instead of the hand, so the resistance stays on the side delts all the way up and your hips do not get to throw the weight into motion. Lateral raises with dumbbells stop in practice around ten kilos before technique breaks down and it becomes more swing than raise; here the stack continues to 90 kg in 5 kg steps, so you can get strong at the exercise and not just good at it. Dimensions 1260 × 1110 × 1343 mm, dead weight 300 kg. Strict exercise. Strict machine.