... drill bit Place of Origin: China (Mainland)Brand Name: Kingdream,CS,LilinModel Number:HA 527GType:Center Drill BitMaterial:Carbon steel IADC ... , sandstone, dolomite with interlayer,etc.Features:1.brand name:Kingdream/CS/LILIN2.size:can be customized,all sized available3.insert material ... can make bits as your requirement 8 3/4" Kingdream/CS/LILIN HA 527G tungsten carbide tricone drill bit