The Double Grade Detail Brush Yellow is a wax tool and the most preferred detail brush among the three. Designed in a paint brush style. The soft but sturdy 1'Grey China bristles allow you to be extremely effective in removing wax residue around emblems and seams. The bristles are 1" long and the whole brush is 7" long helping you to get into those hard to reach places. The Grey China bristles are thicker and longer making it easier at removing residue. When waxing any car there will always be seam and areas that have left over residue. So the China Detail Brushes are a key tool for any Professional or Fanatic especially the yellow with grey bristles.