Laser pointer holder suitable for most common lasers, such as the Army painter one pictured.

Used to visualize and resolve disputes about line of sight (LOS). Provides a clear visual aid for determining if one model can "see" another, helping to clarify confusing terrain or model placement, preventing arguments and speeding up gameplay. 

Snaps right in with little effort then rotate it so the laser stays on and aimed in the direction you want.

Taller version available to get a better angle.

My first public design so feedback appreciated!