2Pcs Diamond Tip Hole Saw Kit 20-40mm Core Drill Bit for Glass Tile Stone | eBay
1-1/2 (1.5) inch (40mm) x 17 inch core bit for hard rock drilling
uxcell 40mm Dry/Wet Hole Saws Diamond Core Drill Bit for Concrete Brick Block Stone Masonry Tile Glass - Amazon.com
TCT Core Drill Set with SDS Extension Shank 35mm, 40mm, 50mm, 65mm, 80mm and 110mm Core Drill Bits for Clean Holes in Concrete, Brick, and Block Work Suitable for Water Pipes, -