A tool set follows a simple logic: one package gives you the basics that get used together, so you are not assembling a bench kit one item at a time. The category covers compact starter kits with nippers, a knife, a file and tweezers, extended sets that add abrasives, drill bits and scribers, cased assortments for longer sessions, and combined packages where the tools arrive with paint or an instructional publication alongside them. The question worth asking is not how many pieces a set holds but which two of them you will actually reach for every evening.
Three kinds of buyer. The beginner, who cannot be expected to know what will be needed and gets a working minimum in one go. Anyone buying a gift, because a set is complete and looks it. And the experienced modeller who wants a second kit — for a case taken to a show, for a holiday house or for a club evening.
Small sets hold three to five tools and cover building from the box: separating parts, cleaning an edge and levelling it. Larger assortments add drilling, scribing and more grades of abrasive. A healthy scepticism applies here: a set with many pieces is not automatically better if half of them never get used.
For styrene kits off the sprue what you mainly need is good nippers, a sharp blade and abrasive. On timber and ship kits the weight shifts towards saws, clamps and drills. With figures it is tweezers, a scalpel and fine shaping tools that matter.
A set usually contains one or two tools you will use daily and a few that stay in the box. So look at the quality of the important ones — generally the nippers and the knife. The rest can be replaced piece by piece with something better from modelling tools.
Some packages add consumables to the tools, most often adhesive or paint with a brush. For a complete start that is convenient, because nothing else has to be bought. Anyone who already owns paint will usually prefer a tools-only set and top individual shades up as needed from model paints.
Once you know which tools you genuinely use, replace them individually — starting with good nippers and cutters, where the difference in quality shows most clearly.