Extremely robust and capable of clearing dense undergrowth and mature scrub, flail mowers are designed to work hard for long periods of time when serious ground clearance is necessary. A series of swinging blades fixed to a horizontal spindle rotate at extremely high speed, literally slashing their way through undergrowth and scrub, leaving rough mulch in the flail mowers path. These machines are normally a favourite amongst town councils and commercial grounds-care companies that need the most heavy-duty equipment to clear roadside banking and other public areas where dense vegetation needs to be regularly maintained.