Original: Balls are struck back and forth with a wooden cylinder, called a bracciale, worn over the forearm: if carelessly played, a broken arm can result because a bracciale can weigh 2 kilograms.
Simplified: Balls are struck back and forth with a wooden cylinder, called bracciale, worn over the forearm, if carelessly played, a broken arm can result: in fact bracciale weighs 2 or 1 kilogram.