The pic isn’t very clear, I’ve enlarged it a little. There are ridges to grip pipe or nuts. I dare say with hard use they’d soon get worn down, but as they are they help a lot.my leatherman already comes with in-built "ruler" and a hexagonal hole is out of my league (with the tools available), but two holes of different diameters and the material in-between cut off (at least that what it looks like to me on the photo?!) could be doable at home, too...
![IMG_5060.jpeg IMG_5060.jpeg](https://bushcraftuk.com/community/data/attachments/74/74888-e48d282f91ba5316c604909b79bc2e03.jpg)