For box spanners then GHW go down to 1mm A/F hex (SW is the hex size) they also do small nut drivers which I have several of and they start at 2.5mm hex which fits their M1.6 nuts
They have open ended spanners down to 2.5 hex but their smaller ones the link seems to be broken at the moment but like the box spanners I seem to recall they go down to 1mm hex
Knupfer go down to 1.5mm in open ended spanners and have a similar size range in box spanners/nut drivers
Edited By JasonB on 24/05/2022 07:10:04