Sorry yeah, that's the inset and the foot, to fine tune the height as it'll act as support to a desk top. Plan is to drill and epoxy the inset, but yeah, only 3.5mm clearance either side. Insert is 18mm wide too so should be fairly well hidden.
I'm squinting as it's a nice bit of kit that just replaces a torn off bit of card, a more standard foot floor protector with the a spacer or washers packing it could do the job (be less of a fret), or leather glued and layered
Sorry yeah, that's the inset and the foot, to fine tune the height as it'll act as support to a desk top. Plan is to drill and epoxy the inset, but yeah, only 3.5mm clearance either side. Insert is 18mm wide too so should be fairly well hidden.