Smooth Rock

“An item to be held by a Pokémon. When the holder changes the weather to a sandstorm, the storm will persist for longer than usual.”

“An item to be held by a Pokémon. It extends the duration of the move Sandstorm when used by the holder.”

“A Pokémon held item that extends the duration of the move Sandstorm used by the holder.”

“A Pokémon hold item that extends the duration of the move Sandstorm used by the holder.”