Based on our own experience, we highly recommend these cutting tools for stained glass art projects. The industrial grade quality of the drill bits made the job of cutting through the thick glass much easier and more precise. The diamond grinder tools were also effective at smoothing the edges of the glass without chipping or cracking. The only downside was the higher price point compared to other options in the market, but the quality more than makes up for it. Overall, a great investment for efficient and professional-looking results.