Diamond Hole Saws - 25 Pack

Hole Saw 25-Pack includes all of the following sizes; 10mm, 12mm, 14mm through 33mm, 35mm, 40mm, 50mm. All sizes based on the measurement of the exterior of the saw blade.

Sizes 14-33 will allow you to comfortably cut the interior and exterior of ring sizes 5-15.

Shank diameters range from 1/4" (7mm) to 3/8" (8mm).

These saws are intended for cutting hard, non-malleable materials like stone, hard plastics, carbon fiber, G-10, composites, etc.  They are not as good on metals or wood that is not stabilized with resin, etc.