Sponges

A cutting wire, a sponge, a needle tool, a wooden rib, a metal scraper and a trimming loop cover almost everything at first. A starter kit includes most of these.

A bat is a removable board that attaches to the wheel head. You throw on the bat and then lift the whole bat off, so wide plates and soft pots are not distorted when you move them.

Calipers measure the opening of a pot and the lid that fits it, so the two match after drying and firing. They also help you repeat sizes across a set of mugs or bowls.