Abstract: An adjustable carpenters square has a handle and first and second blades extending from the handle in a substantially perpendicular relationship. The first blade is fixed in the handle and the second blade is pivotally mounted on the handle to enable it to be adjustable with respect to the fixed first blade to ensure that it is at a true 90° to the first blade. A cam mechanism is mounted in the handle and engageable with the second blade to pivot the second blade with respect to the first blade. The cam mechanism includes a one-piece cam having a cylindrical base and a cam portion offset therefrom. This cam mechanism enables the method of the present invention of adjusting the perpendicular relationship between the two blades to be achieved with a high degree of accuracy.

Abstract: A tool, system, and method for shaping a wooden workpiece. The system includes a lathe, a toolrest, and a woodturning tool for removing material from the workpiece. The tool includes a handle with a shaft extending longitudinally outwardly therefrom. A cutter is provided on an end of the shaft. The shaft includes a longitudinally-extending bottom surface and a longitudinally-extending side surface. The side surface extends laterally outwardly from the bottom surface and at an obtuse angle relative thereto. Each of the bottom and side surfaces is flat and is separately brought into contact with the toolrest on the lathe to steady the shaft and use the cutter on the workpiece. The orientation of the cutter is changed between a first position and second position depending on which of the bottom surface or side surface contacts the toolrest.