Product Name: <br> Vacuum Brazed Diamond Dry Drilling Core Bits<br> <br>Quantity: <br> 6 Pieces Different Size<br> Size Included: 06mm(1/6"), 08mm(5/16"), 28mm(1-1/8"), 32mm(1-1/4"), 38mm(1-1/2") and 45mm(1-3/4")<br> <br>Specification: <br> Diameter 6-16mm：35mm Max working depth, 10mm Diamond height, Total Length 62mm<br> 6mm-16mm bits with Wax inside helps cooling the bits<br> Diameter 19-152mm：50mm Max working depth, 15mm Diamond height, Total Length 75mm<br> **The Thread of Drill bits are 5/8-Inch-11, Recommended Machine: angle grinder** <br> <b>If you fit them on drill or other machine, you need an adapter, such as SDS, hex, Round plus shank...</b><br> <br>Application : <br> Dry/wet drilling for porcelain tile, granite, marble, stone, Masonry, brick...<br> <br> Feature: <br> 1. 1.Fast and Smooth drilling<br> 2. Long lifetime<br> 3. Less Chipping<br> 4. Minimizing any breakage<br> 5. Less loss of material<br> 6. Less heat generation<br> 7. Better finish quality<br> ================THE END================<br> Available Diameter: 6mm-152mm(1/6 Inch to 6 Inch).<br> Note: If the value of your order is more than $100 in our store,<br> we'd like to send it to you by free UPS from China, only for American order.<br> <br><b>Operation Tips for Vacuum Brazed Diamond Drill core bits</b> <br> 1.Do not use these drill bits with hammer mode<br> 2.Only fit these drill bits on a cord drill, not cordless drill(no enough power)<br> 3.Only for tile drilling not recommend for the material behind the tile<br> 4.For horizontal drilling,just give a gentle pressure<br> For vertical drilling, the weight of the machine will give sufficient pressure<br> 5.Start drilling as per following instructions:<br> 1) Place the drill at a 45 degree angle<br> 2) Drilling till the hole start to form<br> 3) Bring the drill up into upright position<br> 4) Continue to drill and swaying the machine along a circle<br>