An isostatic brush holder (10) comprises a central body (12), one or more arms (14, 14′) rotationally disposed in proximity of the opposite ends of said central body (12), and defining a first and a second end (16, 16′), and a plurality of brushes (20) cooperating with at least one elastic element (22), where said arms (14, 14′) define the respective first ends (16) of quick release snap catches (24, 24′), said arms being pivoted to each other at the second ends (16′), said arms being further connected in a swivelling manner and in proximity to said second ends (16′) at the opposite ends of said central body (12).