SIGHTMARK COLLIMATOR LASER FOR ARROWS OR BOLTS WITH 8/32 THREAD (UN)
Sightmark laser boresight with an 8/32 thread, for arrows and bolts, to zero the sight of the bow or the crossbow.
The Sightmark laser boresight is used to zero the sight of a bow or a crossbow while spending fewer arrows: it screws onto the shaft with an 8/32 thread and projects a laser dot in the direction the arrow is pointing.
The 8/32 thread is the same one that takes arrow and bolt points, so the boresight takes the place of the point while the adjustment is being made.
With the dot projected on the target, the pins or the reticle of the sight are adjusted until they line up with it. The setting is then always confirmed with live shooting, at the distance you are going to shoot.