A gift as precise as the work.
The concept of the ANGLE MASTER PRO 6i is straightforward trigonometry. Your 6" caliper becomes an adjustable hypotenuse of a triangle with two identical adjacent legs. Reading inches (.001" increments), there are 6,000 possible angle settings over a 90-degree quadrant. This provides accuracy exceeding one minute (5,400 minutes = 90 degrees). Using metric divisions, (.01 mm increments), there are 15,240 angle settings over a 90-degree quadrant. Either choice will provide accurate results previously attainable by much more expensive means, which typically are not portable.
A web-based calculator for the Angle Master is also available here.
This item is no longer in production and is not available for purchase. It is listed here for reference purposes only. The last known published price is listed below.