Hejian Deris Petroleum Drilling Equipment Co., Ltd

1.Reliable bearing system 2.Type:Milled tooth & TCI 3..size rang from3&#*4;1/***6&#*4; 4.Certification:ISO*

Used Warranty:life hours is **0h and the meter is ***0m Warranty:4 years Material:alloy steel, tungsten carb

Bit Diameters: 5 7/8&#*4;, 6&#*4;, 6 1/2&#*4;, 8 1/2&#*4;, 9 1/2&#*4;, 9 5/8&#*4;, 9 7/8&#*4;, *2 1/4&#*4;, et

1.used for oil filed, water well 2.Size:from 1.8 (*5mm) to *6 (**0mm) 3.rubber seal or metal seal

Brand Name:kingdream Model Number:**7 Type:Center Drill Bit Material:alloy steel, tungsten carbide insert

Brand Name:kingdream Model Number:**7 Type:Center Drill Bit Material:alloy steel, tungsten carbide insert