Smaller wrenches are round - Wheeler Fine Gunsmith Equipment SAE/Metric/Hex/Torx P-Handle Driver Set - 30 pc

I bought this set because it looked pretty comprehensive. I built an AR and needed a VERY SMALL metric hex wrench (1.5mm & 2mm). Both had the edges rounded off and were useless. Fortunately, I still had the rusty old set of wrenches that I was trying to replace and had to use them instead. Highly disappointed.