Beijing Faster Drilling Tools Co., LTD is a manufactuer of tricone bit,PDC bit ,hole opener and drag bit,also carry all major China Manufacturers, such as Kingdream and Beste famous brands. Additional bits specifications that we offer are as follows: &©|8226; Size: 3 7/8¡± up to 26¡± &©|8226; Roller Cone Type: Mill Tooth and TCI (tungsten carbide insert) &©|8226; Sealed Bearing and Open Bearing &©|8226; Formation: Soft / Medium / Hard / Very Hard Please p...
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