Excellent for making clean and accurate holes in glass, tile, marbles and ceramic. Start your hole diagonally, make a round trace and then hold drill straight. 8mm 1, 10mm 1, 12mm 1, 14mm 1,16mm 1, 18mm 1, 20mm 1, 22mm 1, 25mm 1, 28mm 1, 30mm 1, 35mm 1, 40mm 1, 45mm 1, 50mm 1.
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