I'm in construction, carpentry specifically , but I often do things associated with other trades as well, gc stuff. I carry my gb every day in addition to my utility knife. I was doing a roof and I was on like the last 20 or so cap, and my utility knife fell through the open ridge of the house. No one else on site, so out came my gb, cut the rest of the cap with it. Never do it again though, absolutely destroyed the edge. The other thing that comes to mind is when I had to custom fit a fiberglass door slab in an existing frame, I had to cut it down and put a new filler in the bottom. There where all these fiberglass ridges inside the panel that I had to carve out with my gb, cause' the utility knife didn't have the reach or the strength.