Description: _x000D_These drill bits are cutting tools used to remove material to create holes of circular cross-section.There are many sizes for your choice and can create different kinds of holes in many different materials. Attached to a drill which powers them to cut through the workpiece by rotation. _x000D__x000D__x000D_Feature: _x000D_Paint on the body of this bit avoids getting rusty. _x000D_Opening neat and smooth, no broken edges, no shaking and chip easily. _x000D_Small incision resistance, drilling stably and will not break the border. _x000D_Mainly used for drilling ceramic tile, marble, granite, concrete and other hard material. _x000D_Ideal for drilling the faucet mounting holes in stone counter top. _x000D__x000D__x000D_Specifications: _x000D_Color: Gold _x000D_Size (optional): _x000D_6/8/10/14/16/18/20/22/25/30/35/50mm _x000D_0.24/0.31/0.39/0.55/0.63/0.71/0.79/0.87/0.98/1.18/1.37/1.96inch _x000D_Quantity: 1 _x000D_Size(mm) 6 8 10 14 16 18 20 22 25 30 35 50 _x000D_Shank Diameter(mm) 5-11 _x000D_Weight(g) 11 21 40 35 47 57 63 70 72 96 122 227 _x000D__x000D__x000D_Instruction: _x000D_1, To prolong its using life, better to use with water for cooling and lubrication. _x000D_2, The hole drill bit can be used with bench drill, hand electric drill. _x000D_3, When you using hand electric drill, start slowly at 45 degree angle and go vertical after you make an initial mark. _x000D__x000D__x000D_Package Includes: _x000D_1 x Diamond Drill Bit _x000D__x000D__x000D_Note:_x000D_1. Please allow 1-2mm error due to manual measurement. Thanks for your understanding._x000D_2. There are two types of shank in different diameters and we will send in random. Please take the real one as standard. 1Paint on the body of this bit avoids getting rusty 2Opening neat and smooth, no broken edges, no shaking and chip easily 3Small incision resistance, drilling stably and will not break the border 4Mainly used for drilling ceramic tile, marble, granite, concrete and other hard material 5Ideal for drilling the faucet mounting holes in stone counter top