The hexagonal rods are made for "on the spot" quick refine adjustment. These are great for correcting negative camber - when the top of the wheel is tipped in towards the body. Camber is the tilt of the wheel along its vertical. Running wider tires or car with lowering springs can cause this issue where your tires are wearing out on the inside. They are also great for older cars where the suspension tends to sag hence the wheel looks "spray out".
To some degree, this is a good thing as it allows more of the tire tread to stay in contact with the ground during hard cornering. But if you have too much negative camber, which degrades cornering performance as well as hinders grip during hard acceleration. Negative camber also wore out the tires faster on the inside.The camber kit can straighten the wheels by dialing out the negative camber, something you can't do with the stock suspension. They are also great for race days where changing from street tires to drag or race tires where the camber need to be adjusted on the spot. There is a notch on the end of the rod where you can manually adjust the rod by dialing the wheel in or out. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Steering & Suspension\Camber & Caster Parts". The seller is "snooozie" and is located in this country: US. This item can be shipped worldwide.