Doug; a cut off hex wrench isn't wasted at all. Before T-handled hex wrenches, especially freakish long buzzards for machine repair, we did our own. Drill good quality rod closest possible size or .001 under hex size across flats, Square, chamfer and press a hex section in & bottomed out. Roughly speaking 10+ diameters depth will retain the hex indefinitely. I'll bet a couple from way back still hide out in a drawer somewhere.