Size:Hole Diameter 50mm 2Pcs 50 mm Diamond Coated Hole Saw Drill Bits for Stone Granite Marble Ceramic Product SpecificationProduct Name: Diamond tip masonry bit, Stone cutting bits, Granite hole bit Outside Diameter : 50 mm Hex Shank Diameter: 10mm Quantity: Total 2 Pcs Please choose from the drop down menu which size best qualifies your need Features Brand New & High Quality Easy to use, Good Performance and long life Excellent for making clean and accurate hole on stone, granite, marble, tile Works better with a electric drill( Excluding in this item ) Diamond drill set with standard 8-10 mm hex shank that will fit cordless screwdrivers, drills etc or use in standard drill chuck Drilling speed: Drill a hole in seconds Use with water as a lubricant Quick Tips 1. Please add water for coolant and drill slowly 2. Start drill at 45 Degree to surface and align to 90 Degree as hole forms 3. Never use drills while machine is in hammer action 4. Holes require no futher work as cutting is clean Regular Air postage from China to United States is FREE and takes 10-25 days delivery to your home We will send out your order within 1-2 days after payment has been received and cleared Please let us know if you are looking for other accessories or hardware. Should you have any queries, please contact me directly We Can List Any Size( Hole Diameter from 6mm - 160mm) & Amount Of This Product How to use a hand drill to drill holes in the stone/glass/tile? Step 1. The bit on the stone/glass/tile 45 degree, open a half-moon notch on it Step 2. Slowly up the bit to 60 degrees, and then gently drill Step 3. Reached 90 degrees, continue to drill Step 4. Drill through the stone/glass/tile finally Welcome to Visit Our Store: www..com/shops/DiamondTools30
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