There are a ton of hand brushes out there. There are even more recommendations as to what to use when. This episode clearly outlines what hand brushes to use when and why. Ian talks about the differences between the Oval and Rectangular brushes and why they are made that way. 3 distinct Oval and 3 Rectangular brushes are recommended (either or) and an explanation is given as to why. The Toko hand brush system is very simple yet effective.