Primo Curved Ash Tool

Which Primo grills does the ash tool work with?

All of them. Nothing in this listing ties it to one size, and unlike a deflector or a gasket it is a hand tool rather than a fitted part, so a Round owner and an XX-Large owner use the same thing. The curve suits the bowl shape a kamado firebox has, regardless of how big that bowl is.

Why do I need a special tool instead of a shovel or a shop vacuum?

Because of the shape and the timing. The curve reaches ash out of the sides of the bowl where a flat blade skates past, and raking is something you can do while a grill still holds warm embers. A vacuum is for cold, fully dead ash only, and even then it will not pull ash out of the corners the way a raking tool does.

How often should I clear the ash out?

Check before every cook and clear it whenever there is enough to reach the bottom vent. Long low cooks and back-to-back sessions build it up faster than a single quick grill. There is no benefit in leaving it: ash does not help the fire, and the moment it starts blocking the air intake it works directly against you.

Doesn't my grill already come with one?

Primo's All-In-One grill packages are listed as including an ash tool and a grate lifter, so check what came in the box before you add another. If you bought the grill head on its own, or you are replacing a tool that has been left out in the rain once too often, this is the standalone listing.