a.2.4 Use a 1-1/2" Suction Base Drilling Ring to hold coolant and prevent the drill bit from
slipping on the counter
a.2.5 Start slowly. Be cautious with the power drill that might slip and damage the counter
surface.
a.2.6 Set variable speed power drill at 100 – 200 RPM. Do NOT use hammer drill on natural
stone, glass, and ceramic.
a.2.7 Hold drill bit vertically and swirl a little to apply pressure evenly in a circular motion.
Be patient and deliberate. It can take 20 - 40 minutes to drill through one inch.
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