T-rule

The T-rule is an instrument used to draw with a set of squares, which slide from one side to the other and from top to bottom, transporting the lines or angles. Its structure is formed by a head and a body, perpendicular to each other. The T ruler slides from top to bottom on the drawing surface, always taking care that its head is well supported on the edge of the desk or drawing table. The T-rule is the easily transportable and installable version of the parallel rule.