Reviewed By Nicholas X (WEST CORNWALL, CT) Reviewed for a 2010 Toyota Tundra —5/11/2017 6:52 AM
They are cylindrical and threaded on the inside, allowing them to be rotated onto the existing studs, and they are shaped exactly like the inside of a 13/16" socket on the outside, allowing the installer to use a hex wrench to tighten them! They do a great job holding the wheels onto the vehicle!! Amazing!!!