Existing commercial and in-house software development tools are often inaccessible to blind and low vision software professionals (BLVSPs), hindering their participation and career growth at work.Building on existing research on Do-It-Yourself (DIY) assistive technologies and customized tools made by programmers, we shed light on the currently unexplored intersection of how DIY tools built and used by BLVSPs support accessible software development.Through semi-structured interviews with 30 BLVSPs, we found that such tools serve many diferent purposes and are driven by motivations such as desiring to maintain a professional image and a sense of dignity at work.These tools had signifcant impacts on workplace accessibility and revealed a need for a more centralized community for sharing tools, tips, and tricks.Based on our fndings, we introduce the "Double Hacker Dilemma" and highlight a need for developing more efective peer and organizational platforms that support DIY tool sharing.