This tool is for dusting hard-to-reach areas, like the narrow part of the soundboard near the treble bridge.
The dusting surface is 100% wool felt. Do not use fluids or chemicals on the felt. For extra dust collection, try wrapping the duster tool with part of a Swiffer pad. If the felt wears out from heavy use, it can be replaced with a new piece of 1/16" thick felt: Pre-cut the new felt slightly larger than the final trimmed size, spray the felt with spray adhesive, fold it over the duster blade, and then trim to final size.