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.