A Braille pin has three parts sharing a common longitudinal axis. A first
part has a first breadth and includes a rounded tip felt by a user. A
second part has a noncircular transverse cross-section and has a breadth
greater than the first breadth. A first shoulder is formed by the
juncture of the first and second parts. A third part has a third breadth
less than the second breadth. A second shoulder is formed at the juncture
of the second and third parts. A pinhole has first, second, and third
sections that respectively receive the first, second and third parts of
the pin. The first shoulder limits upward pin travel by abutting an
overhang at the juncture of the first and second pinhole sections. The
second shoulder limits downward pin travel by abutting a step at the
juncture of the second and third pinhole sections.