These are a lot smaller than I expected, but they did the job. I needed to expand a circular airgap hole in my quartz countertop. It took a bit of elbow grease and about an hour of grinding, but managed to use the largest bit here to take the hole from 1.25" to 1.5".
π§ Efficient Astro Tools 1442 A32 Mandrel 4 20 for Precision Work
3 Review
πͺ Weiler 56490 Mandrel Cutter Diameter
3 Review
π§ Astro Tools 1442 A34 10 24 Mandrel: Top-Quality Precision Tool for Efficient Operations
3 Review
Effortless Sanding with Dremel EZ407SA Drum Sanding Mandrel
3 Review