Polishing tool for high aspect ratio profiles

The present invention relates to a polishing instrument comprising an elongated shaft comprising a neck and a tip at the first end of said elongated shaft, said tip being formed of a polymer compound of thermoplastic and/or thermosetting materials and having a radius or equivalent radius of less than 3cm; a method of, polishing, such as micro-polishing by use of the polishing instrument comprising applying a force to the polishing instrument, and preferably a rotational speed of at least 100, such as at least 2.000 rpm while maintaining a runout less than 10µm; and a method of forming the polishing instrument using injection moulding that may comprise compounding a polymer compound material comprising micro-abrasive grains prior to injection of the compound material into the mold, to achieve a desired dispersion.