1>Any size are available; 2>High quality; 3>Good wear resistance; 4>Flexible delivery; 5>100% original ... ,bars,balls,burrs,PCD blades,PCBN blades,ceramic inserts,and customized products etc.In the meantime,please be informed any grade ... provide any sizes and high quality products you need. manufacturer selling customized design tungsten carbide drill bits in tools(high quality) YG6 YG8 YG10 drill ...