These tool handles have been designed to be both ergonomical and functional. The handles are manufactured from high grade aluminium with a soft PVC outer shell. There profile of the handles have a flat surface either side near the tool end that makes them more comfortable to hold and stops them from rolling when put down.
The back of each tool handle can also be unscrewed allowing the filling of the inner core with vibration absorbing lead shot.
For more information see the following video.