After you have selected the proper size Chuck Alignment Guide using the instructions above, remove the two screws from the back (label side) of BullseyeBore Core. Then overlay and center the proper size Chuck Alignment Guide onto the BullseyeBore Core label and replace the two screws. The Standard Chuck Alignment Guide contain angled fillet screw head slots for the screw heads to fit into so they are flush with the Standard Chuck Alignment Guide after the screws are installed.
Always read and follow the BullseyeBore Core Safety Guidelines before attempting to use BullseyeBore Core or any BullseyeBore Core accessories on a drill or in an actual drilling operation. When using Standard Chuck Alignment Guides, please also ensure that BullseyeBore Core is securely connected to the “face” of the chuck.