A device for assisting a user in marking an overhead surface to correspond
with a mark on a surface below includes a substantially hollow housing
having pressurized gas containers received therein. The pressurized gas
containers are in communication with a projection barrel extending
upwardly from the housing. A lower laser module is positioned on the
lower surface of the housing for projecting a laser beam downwardly onto
a target mark on an underlying surface. The paint ball projection barrel
is coaxial with the lower laser module such that when the laser beam is
directed toward the target mark, a paint ball can be projected upwardly
to produce an overhead mark that is axially aligned with the target mark.