Spiked weight

Chain Gates are large, spiky logs on chains appearing in Super Mario World 2: Yoshi's Island and its remake Yoshi's Island: Super Mario Advance 3. They typically appear in castles and forts.

At the top of a Chain Gate is a wooden wheel with a question mark on it. If Yoshi hits the pulley with an egg, the gate will rise, allowing Yoshi to pass through barrier. Chain Gates cannot be destroyed.