THIS BIG RIG KIT #1 IS THE SAME AS THE "STANDARD KIT", EXCEPT THAT WE ADD THE PLUG PAD KIT. THE PLUG PAD KIT WORKS WELL ON DEEPLY DISHED WHEELS, WHETHER IT IS A LIGHT OR HEAVY-DUTY TRUCK. THE PLUG PAD KIT CONSISTS OF TWO SPECIAL PADS. THE FIRST IS A 4" PLUG PAD. THIS PAD IS USED TO POLISH THE INSIDE BACK"CORNER" OF THE WHEEL WHERE THE AXEL HUB MAKES ACCESS DIFFICULT. THE SECOND PAD IS A 2" PLUG PAD. THIS PAD IS USED TO POLISH THE AREA BETWEEN THE LUG NUTS. THE PLUG PAD KIT IS NOT INTENDED FOR HEAVY CORROSION, BUT LIGHT TO MODERATE OXIDATION. FOR HEAVY CORROSION A MORE AGGRESIVE PAD WILL BE NECESSARY. FOR THE COMPONENTS OF THE BIG RIG KIT #1, SEE THE "STANDARD KIT" AND ADD THE PLUG PAD KIT, WHICH CONSISTS OF 2 4" PLUG PADS AND 2 2" PLUG PADS. PLEASE SEE THE "HOW TO USE" PAGE. THIS BIG RIG KIT IS NOT INTENDED FOR CLEARCOATED WHEELS.