Diamond Step Drill Bit for Porcelain Tile and Marble, 20/35/50mm

<p>This is a three-step vacuum-brazed diamond drill bit for tile, stone and ceramic work. Its stepped cutting diameters are 20 mm (0.79 in) at the tip, 35 mm (1.38 in) in the middle and 50 mm (1.97 in) at the base, and each step is 12 mm (0.47 in) deep. One bit can drill, enlarge and chamfer holes in porcelain tile, granite, marble, ceramic tile, quartz and concrete.</p><ul><li>Vacuum-brazed diamond cutting surface</li><li>Three diameters: 20 mm, 35 mm and 50 mm</li><li>5/8"-11 thread fits angle grinders</li><li>Handheld electric drills need a conversion rod</li><li>Suitable for dry or wet use</li></ul><p>Each unit is one step drill bit.</p>

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