| 摘要 |
An improved tool is provided for locating the corner or edge of a workpiece while setting the workpiece at a desired angle with respect to a work surface. An elongated arm member slidably engages an elongated base member at one end, allowing for the measurement of the distance between the opposite end portions of the arm and base member and calculation of the angle at which the workpiece is disposed. The base member is provided with generally opposing first and second mating surfaces for locating the corner or edge of the workpiece. Different embodiments are provided for use in finding edges of workpieces having various angles. Different embodiments further provide for the use of multiple measuring instrumentalities and calculations.
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