Hi Glen, the wire loops, I believe are used in large scale work for removing/ scraping excess clay or waxes, such as chavant/ Roma Plasilina etc.
For your chosen size of 54mm you may well be better off with some home made tools.
Starting off with tooth-picks and shaping them to slightly different profiles, you'll be amazed at the different effects you'll be able to achieve.
For finer work in this scale, you can use needles or lengths of rod sharpened or filed to various profiles to suit your needs.
You can clean them of putty with a small bundle of wire-wool kept in a zip-lock bag, just put the end of the tool in the top of the bag and move back and forth between your finger and thumb and the tools are good as new. No need to handle the wire-wool.
Below are some tools that I use for sculpting anything from 28 to 90mm.
You can see they are very basic. The rod is brazing wire and can be picked up in many gauges to suit your needs.
Along with your own choice of blades and sanding and smoothing mediums I'm sure you'll be able to get off to a good start.
All the best....Roy.