This machinist's clamp is ideal to hold the Cardellini RED laser pointers to Cardellini clamps or any 3/8" rod. It's clamping area is designed to hold objects 1/2" in diameter. You may have to wrap some tape around your laser pointer to bring it up to 1/2" diameter. The picture depicts it attached to a mini-Cardellini Clamp.
(Cardellini Clamp sold
NOTE: Not compatible with the Infiniter Laser Pointers.
Laser pointers are extremely useful tools on set or out on a location night shoot. Very often, you will see either the DP, Key Grip, or Gaffer using a laser pointer to indicate a place (generally up high on a set or a stage) to a crew member where a lamp or other piece of gear is supposed to be hung or rigged. The laser pointer sends out an extremely bright red or green "dot", that is easy to see way up high. The First AC or Dolly Grip will also attach a laser pointer to a dolly or crane arm with a clamp and aim it at a specific mark on the ground or stage floor that corresponds to a precise location or distance from a subject. As the dolly or crane moves, the First AC and/or Dolly Grip now have a precise reference or target to aim for or judge distance with.