Will these work with my OEM hub and studs?

These are M12 x 1.5 metric lugs—confirm your vehicle uses that thread size and pitch before ordering. If your studs are a different metric size or SAE, these won't seat properly.

Do I need a special key or tool to remove the locks?

The lock design is integrated into the nut, but removal tool details aren't specified. Check with the seller or your vehicle's manual to confirm what you'll need to uninstall them later.

Can I use these with my extended-offset wheels right away?

Seat them hand-tight first and verify they're catching the wheel correctly—extended nuts can sit differently depending on wheel offset. Torque to your vehicle manufacturer's spec once you're confident in the fit.