dalehsc
ALLIANCE MEMBER
I've never had a need for low profiles. If I did stumble upon a random need for one, I think I would opt for a pass through socket/ratchet set instead. These could at least be used for a wider variety of tasks and still accommodate for the low profile requirement.
Here is a comparison photo I found with a quick Google search of two 18mm sockets, one standard height and one in a passthrough design.
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I have the gearwrench pass through set that works for me