Sliding T bevel

T bevel with protractor and dividers

A sliding T bevel, also known as a bevel gauge or false square[1] is an adjustable gauge for setting and transferring angles. The handle is usually made of wood or plastic and is connected to a metal blade with a thumbscrew or wing nut. The blade pivots and can be locked at any angle by loosening or tightening the thumbscrew.

In use

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


  1. Wormell, Richard. 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.
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