An arm blaster is a training item that is used to supplement bicep and tricep workouts. It separates these muscles during weight lifting workouts such as bicep curls, ensuring perfect technique and prevents 'cheating'. By keeping the arms motionless and close to the body, the biceps do the majority of the effort, resulting in more efficient workouts and improved muscular development. It's a great supplement to any strength training regimen, and it's appropriate for both beginners and seasoned lifters.