The terms curl arm blaster and bicep blaster refer to the same exercise item. Both are intended to improve bicep curl workouts by isolating and maintaining appropriate technique. The words are sometimes used interchangeably, with "curl arm blaster" stressing the device's role in aiding with curl workouts and "bicep blaster" indicating the device's special focus on the bicep muscles. The differences, if any, would be determined by the unique design elements of each brand or model.