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Pick a SIZE: ID#4-3---1/4" $10.80 ID#4-4----5/16" $12.80 (+$2.00) ID#4-5---3/8" $14.80 (+$4.00) ID#4-6---1/2" $18.80 (+$8.00) ID#4-7---1" $23.80 (+$13.00) Quantity: The selected item is out of stock, please select a different item or combination

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Drill core bits are hollow. They extract small round (plugs) and leave a hole. Always use lots of water to reduce friction. Can be used with portable drills for best results with Core Bits. Can be used on ceramic- bottles- tile or glass.