A boxed clay tools kit typically contains a dozen items of which four get used constantly and the rest sit in the box. Knowing which four means a beginner can buy well for very little, and it means a kit is a way of discovering preferences rather than the final purchase.
The four that get used
A wooden rib for shaping, a metal kidney for cutting and compressing, a trimming or loop tool for taking material away at leather hard, and a cutting wire. Add a needle tool and a sponge and the list is complete for throwing. For hand building, swap the wire for a serrated kidney to score joins.
What a kit is good for
Finding out which shapes suit your hands and your work, cheaply. Boxed sets are inexpensive and contain enough variety that the ones you reach for become obvious within a few sessions. Then buy those individually in better quality, because a good rib lasts decades and a cheap one is fine until it is not.
What is worth spending on
Trimming tools, because a blunt edge chatters and a sharp one cuts cleanly, and they blunt with use. Kidneys, because a well-shaped metal kidney does work that a poorly stamped one cannot. Everything else in a beginner's kit is close enough between price points that the cheap version is fine.
Where to buy
Pottery suppliers stock both boxed kits and individual tools, usually in a tools section separate from clay and glaze. Ordering tools alongside a clay order spreads the delivery charge, which on a light order of tools alone can be a significant proportion of the cost.
Questions people ask about clay tools
What tools do I actually need?
A wooden rib, a metal kidney, a trimming tool, a cutting wire, a needle tool and a sponge. That covers throwing.
Are boxed clay tool kits worth buying?
As a cheap way to discover which shapes you reach for, yes. Then buy those few in better quality.
What is worth spending more on?
Trimming tools and kidneys, where quality changes the result. Most other beginner tools are fine at any price.