The lock mechanism holds both components in place and can be a variety of mechanism types. These include wing nut, lever cam, slide lock or set screw. In use, you usually register the stock against a flat surface and then mark or check the angle against the beam.
Bevel-Gauge Basics - FineWoodworking
Repeatable, Scaleable Dovetails From a Single Layout - Paul Sellers' Blog
The Sliding Bevel
The Sliding Bevel
Sliding T bevel
Sliding bevel square plan
Sliding Bevels
Engineer sliding T bevel plan
How to Use a Slding Bevel
Sliding Bevel, Tool Guide
How to use a sliding T- bevel #carpentry #tricks #wood #Bevel gauge