Build stronger, more defined arms with this dual-function machine. Controlled resistance and guided movement isolate your biceps and triceps for focused training—without crowding your space with multiple machines. Switch between curls and extensions in seconds, then dial in your setup with 4 bicep and 3 tricep starting positions to match your range of motion. This adjustable design supports strong muscle contraction during bicep curls and full extension during tricep work for consistent, controlled movement. Multi-grip handles and a quick-adjust seat keep your form locked in for smoother reps, while a wide, angled arm pad provides stable support through every set. The 250 LB weight stack adjusts in 10 LB increments with a magnetic tethered pin for quick weight changes, while a spiral cable cam adjusts resistance throughout the movement to match your natural strength curve. Built with stainless steel guide rods, 5mm nylon cables, and machined pulleys, it delivers smooth, reliable performance through every set.