Will the 58.4mm base fit my 58mm basket?

It is designed for standard 58mm baskets and sits close to the wall for a clean edge. In worn or slightly undersized baskets it can feel tight, so check your basket's actual inner diameter.

Is a heavy tamper better than a light one?

A heavier tamper like this one lets its own weight do more of the work, which helps keep pressure consistent. Light tampers demand more effort but are easier to carry and store.

What is the difference between the 58mm and 58.4mm versions?

The 58.4mm base is a closer fit for most modern 58mm baskets. The 58mm version leaves slightly more clearance and suits baskets that run narrow.

Does it come with a stand or mat?

The tamper is sold on its own. A tamping mat or stand is a separate purchase if you want to protect the base and counter.

Is the flat base better than a convex one?

A flat base matches the flat shower screen of most machines and gives an even puck surface. Convex bases are a personal preference and not required for good extraction.