On 18/02/2018 01:43, Clare Snyder wrote:
On Sat, 17 Feb 2018 16:48:03 -0800, ultred ragnusen
wrote:

Can you teach me more about lug bolts & related tire tools on this vehicle
whose tires I rotated today and which I plan on rotating every 4K miles (6K
km).

First question is what is the practical difference between these three 21mm
(13/16ths) "sockets" for the lug bolts on the car I was working on today?
http://wetakepic.com/images/2018/02/17/socket_ends.jpg
1. The standard lug wrench (green) has 6 points, each at a sharp angle.
2. The impact socket (black) has 6 points, each at a semicircular angle.
3. The standard socket (chrome) has 12 points, each at a sharp angle.

The impact socket is superior for that application - whether using an
impact driver or not. A 12 point socket is better in situations where
fine motion is required.

Second question, are these "cut marks" on a lug nut normal?
http://wetakepic.com/images/2018/02/17/dented_nuts.jpg

Yes, they are there from the factory.

Why? Not all nuts have this mark, and in the UK nuts with this mark are
generally used for hoses that contain inflammable gases.