Will these work with my aftermarket wheels?

Yes — these are M12 x 1.25, which is the standard thread pitch for most North American vehicles. They'll thread directly onto factory studs. If your wheels use a different stud pattern or require a specific nut style, verify the thread size and pitch before ordering.

Do I need to do anything to the finish before installation?

The anodized coating is ready to install as-is. No prep, paint, or sealing needed. The finish is designed to handle brake dust and road salt without additional treatment.

Why get 20 instead of just 4 or 5?

Four lug vehicles get one full set plus four spares — handy if you lose or damage one on the road. Five-lug cars get a full set plus extras. The extra nuts cover stud replacement, swaps between wheels, or lending to a friend's car.