I tried h20xtc's idea of a pipe nipple extractor on my SRAM AXS crank bolt that had become stuck and subsequently stripped in my attempts to use more and more leverage to remove it. The pipe extractor is a great idea, but in my case it just finished the job of reaming off the threads of the bolt leaving me with nothing to push against. What did finally work was a #5 spiral extractor and an Irwin Hanson adjustable tap socket, using a 3/8" drive breaker bar with a 1/2" x 24" pipe for leverage and a 1 1/2" x 24" pipe on the opposing crank (pedal removed) for counter force. I may never get the remnants of the bolt off the extractor, but at least I'm not buying new cranks. Thanks h2oxtc!