I don't know if these two items in the picture are used in in the clearance check/setting process, but if so does anyone know:
----- What the crowfoot end wrench on the left is used for?
----- What the circular object on the right is and what it is used for?
----- What the crowfoot end wrench on the left is used for?
----- What the circular object on the right is and what it is used for?