Selectively flexible extension tool

A selectively flexible extension tool comprising:

• a line assembly comprising a first line and a second line;
• and
• a plurality of sequentially arranged links, the plurality of sequentially arranged links actuatable from a slacked position to a tensioned position by tensioning the line assembly, the plurality of sequentially arranged links together comprising a first line guide and a second line guide, the first line of the line assembly extending through the first line guide and the second line of the line assembly extending through the second line guide;
• wherein the first line defines a first displacement when the plurality of sequentially arranged links are moved from the slacked position to the tensioned position, wherein the second line defines a second displacement when the plurality of sequentially arranged links are moved from the slacked position to the tensioned position, and wherein the first displacement is substantially equal to the second displacement;
• wherein the plurality of sequentially arranged links include at least two links having different shapes such that the plurality of sequentially arranged links form a predefined non-linear shape when moved to the tensioned position.