On 31/12/2019 14:46, John wrote:
Why do most car mechanics pride themselves in using the correct spanner for
any nut - yet plumbers who have less sizes to cope with just maul stuff
tight with crude grips?


You can rarely use a ring spanner or socket in plumbing. An open ended
spanner is not that much better than a good adjustable spanner.

Besides that, there may be less standardisation of nut sizes in plumbing
*because* everyone uses adjustable grips?