These particular person keys are then soldered along with silver solder to make the connected group. Next the keys are polished. Keys for economical models may be placed in a tumbling desktop, where friction and agitation of pellets in a revolving drum polish the pieces. More costly keys may be buffed in my opinion by being held against the rotating wheel of a sharpening desktop. Some keys may be silver plated, after which polished. Clarinet manufacturing itself is a reasonably conservative industry, counting on highly skilled craftspeople who do much work by hand. Most of the ideas in clarinet design are actually 100 years old. One area that continues to be in flux, however, is the manufacture of clarinet reeds. While the best reeds are said to come from a species of cane grown in France, some avid gamers and makers are experimenting with wild cane that grows in California. Synthetic reeds have also been built these days, and more analysis is being done to enhance them. As sources of herbal cane diminish, and ordinary first-class is not high, synthetic reeds may be what most clarinet players use in the future.