According to Leo P. McDonnel, in his book Hand Tools for
Woodworking (published in Brazil by Record in 1962), “Specialty
planing tools are necessary for mortise and tenon and half-lap
joints, and for moldings on trim and frame work.
On the left, top to bottom: 3 irons from molding planes, 4 irons
from round planes used in making molding profiles. On the right,
top to bottom: 3 irons from rabbet planes, 3 irons from match
(tongue and groove) planes, and 3 irons from plow planes.
For this article I have chosen a few planes in my collection,
acquired mainly in Rio de Janeiro flea markets, to describe
their basic functions. Most of them are antique wooden bodied
planes, of diverse origins, made by anonymous craftsmen—the
co-authors of this overview.