Rosewood Sliding Bevels
Describes as a try square which can be adjusted to any angle for marking or checking. The blued steel blade is secured at an angle either by a brass locking lever or, more traditionally, by a turn screw (use a screwdriver).

The turn screw version is made in accordance with BS3322

A similar range of bevel is available in beech, but with only the screwdriver locking system.