This tool tip was learned the hard way by Adam on a job he did (with Jamie!) many years ago that required precision carving around a glass bottle. Back then, the job took hours and hours with careful and stressful application of a circle cutter. And it was only afterward that Adam learned about the efficiency and precision of a hardened steel glass cutting bit for his Dremel rotary tool. Let's watch a demonstration of this tool that shows why Adam always has a few on hand in his shop!