State the extinguisher suitable for putting off the class D and Class k fires

For Class D fires, which involve combustible metals, the suitable extinguishers are specialized dry powder extinguishers. These extinguishers use agents like sodium chloride, graphite, or copper powder, specifically designed to smother metal fires without reacting with the burning metal.

For Class K fires, which involve cooking oils and fats, the suitable extinguishers are wet chemical extinguishers. These extinguishers contain a potassium acetate-based agent that creates a foam layer to cool and smother the fire, preventing re-ignition.