Train smarter. Grow faster. The Spinto Arm Cuff is your shortcut to clean, strict curls and laser-focused bicep training. Built like a modern bicep blaster, it locks your arms into perfect position to eliminate swinging, cheating, and wasted reps. Whether you're using a barbell, dumbbells, or an EZ-curl bar, this isolator keeps the tension where it belongs — on your biceps. Designed for bodybuilders, strength athletes, and fitness enthusiasts chasing serious arm growth, it features lightweight aluminum construction with ergonomic padding for comfort and durability. Take the guesswork out of curls. Make every set count. Build your peak with Spinto.