Electroplated diamond coating will wear off if the tool gets too hot. Never let your drill bit run dry. Tips: Please add water for coolant and drill slowly. start drill at 45 Degree to surface and align to 90 Degree as hole forms. Never use drills while machine is in hammer action. Holes Require No Further Work As Cutting Is Clean. Product Description: Size(Diameter): 6mm, 8mm, 10mm,12mm,16mm, 20mm, 25mm, 30mm, 40mm, 50mm Packing Includes: 10pcs * Diamond Coated Drill Bit Color: Silver Weight: 190g Applicable Industry: Suitable for Stone, Tiles, Ceramics, Glass and Granite, etc Processing Can be used with a standard electric drill (not included) Easy to use, high quality, good performance, long life Start your hole diagonally, make a round trace and then hold drill straight These diamond core bits (diamond hole saws) are the best value that you'll find on the web or anywhere else.
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