7 mm thin-wall tube spanner or hex socket

[James P]

You will need a 1/2" chuck drill (think of that as a "mini lathe") and a angle head grinder with a flap wheel to do this trick, put the deep socket in the drill chuck and while running both, work the flap wheel along the socket till you bring it down to the desired size that will fit in the recess. I would replace the 7mm bolts with allen headed caps (as they should have in the first place).