Sliding T bevel

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T bevel with protractor and dividers
In use

A sliding T bevel, also known as a bevel gauge or false square[1] is an adjustable gauge for setting and transferring angles. Different from the square, which is fixed and can only set a 90° angle, the sliding T bevel can set any angle and transfer it on another piece.

The bevel gauge is composed of two elements connected with a thumbscrew or wing nut, which allows the blade to pivot and be locked at any angle. The handle is usually made of wood or plastic and the blade of metal. The bevel can be used to duplicate an existing angle, or set to a desired angle by using it with any number of other measuring tools (such as a protractor, or framing square).[2]

See also[edit]


  1. ^ Wormell, Richard (1868). An Elementary Course of Plane Geometry. p. 23.
  2. ^ Bureau of Naval Personnel (1973). Tools and Their Uses. Dover Publications. p. 98. ISBN 978-0-486-22022-2.


  • Reader's Digest "Book of Skills & Tools"