The swivel mirror is used for directing the laser beam through any angle from 0° to 106°
It allows adjustment to be made along machine diagonals or on inclined axes. The swivel mirror can be used as an alignment aid for ANSI B5.54 diagonal measurement and is
also useful when measuring slant-bed lathes. It works with all the optics kits, including HP optics using the HP optic adaptor plate.