Large Base Diameter Steel Drilling Tools , Sandstone / Limestone Core Drill Bit

1, Fetures 1). High quality material from Valin Group 2). Guaranteed welding process(full welding) 3). Optimized teeth angle 4). Specialized teeth arrangement 5). Movable pilot holder(easy to replace teeth) 6). Conical body (protect drilling buckets from getting stuck ) 2, Our service 1) Standard or OEM or customized products are provided 2) Track the production 3) Arrange samples for inspection if needed 4) Take photos for confirmation ,or make testing by the Third party