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Dremel 663 Diamond-impregnated Glass Drilling Bit, Rotary Tool Accessory with 6.4 mm Diameter for Drilling and Cutting Glass : Amazon.co.uk: DIY & Tools
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Dremel 1/8 in. Rotary Tool Glass Drill Bit for Glass, Ceramic Wall Tile, Glass Block, Glass Bottles, and Jewelry 662DR - The Home Depot
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