This can be used without the aid of a Looksee camera from full chambers. Use the sense of touch and judgement to know when you’ve reached the target, then wind into them and when you pull back you will feel if you have managed to latch onto them.
Remove in sections a bit at a time until clear, if blockage releases hold onto the rods or they could get dragged away. Always use the handle to manoeuvre the claw.
It can also be used in clear chamber after jetting to remove debris discovered, if the claw starts getting stuck because of voids in VC refer to using the single claw as this won’t get stuck.