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https://www.leadingtool.com/product-thin-wall-drill-bits-for-glass-tile.html          
 
Super Thin Wall Drill                Bits For Granite, Engineered stone, Glass And Porcelain Tile.
Our Thin Wall Core Drill Bits are used to drill glass, ceramics, porcelain, ceramic, porcelain tile, limestone, slate, marble, granite, stone, and fiberglass, etc.     
 
Product Description
 
Sintered (metal bond) Diamond Core Drills are the Finest diamond core drills in the world. Diamond held in a metal matrix bond for drilling, glass, alumina, quartz, ruby, yag, silica, silicon, graphite, composites and other hard abrasive non metallic ceramics.     
 
Wall Thickness: 1 mm (1/40 ") provide, long lasting, faster drilling (RPM), and minimum heat generation performance.
 
Each Diamond Core Drill steel body is machined from a single piece of steel on high precision CNC machine. This provides Very Precision Tolerances, Accuracy, & Consistency.     
 
Diamond Height (depth) of 10mm, insure that these drills provide highest possible diamond drill life in industry.
 
All drills are available with either strait shank, Cone shank, M14 or 5/8-11" female thread to fit water swivel adapter Model 5811 or 1/2" gas male thread (belgium mount) to fit water swivel adapter Model 12GF.  Other mountings such 3/4-16", 1-14", 5/8-18", habit, & matthews, and others can be produced as well.     
 
Diameter available from 3/16" (5mm) to 6-3/8" (160mm).

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