I bought some 2mm scale bolts, and needed to buy a driver to tighten them up. I bought two of a similar-looking driver to what you posted (different company, though), and it also has a slim profile tip to reach into tight spaces. What I found was that if you try to tighten the bolt too much, the inside of that tapered part tends to round off and won't tighten the bolt at all any more. So after that, I bought these much sturdier ones:
https://www.ebay.com/itm/SSD-RC-2mm-...EAAOSwQiFaebl9 Now I use the smaller-tipped one to set the bolt in place, and these thicker ones to tighten it. You may find that these larger sockets are difficult to fit into tight places, but on the bolts for the bed, space is not a problem. -Mike