Sand Force is an ability introduced in generation 5.
14 Pokémon can have this ability, such as Drilbur, Excadrill, Landorus, Diglett and Dugtrio. For 11 of them it is the hidden ability, usually obtained from events, raids or breeding.
Official effect
Strengthens Rock, Ground, and Steel moves to 1.3× their power during a sandstorm. Protects against sandstorm damage.