- Metro Driltech International Inc.
- Dth Hammers, Button Bits,drilling equipment.
- Address:
- TOP DRILL INTERNATIONAL CO LTD
- DTH Hammers, DTH Hammers Bits, DTH HAMMER (ACE Hammer Series) , TORNADO HAMMER (CLUSTER DRILL) .
- Address:3Ba-120, Sihwa Industrial Complex, 2182-16, Jeongwang-dong
- NOVA R & E
- Button Bits,Shank Adapters,Couplings,Extension Rods,TDTH Hanmmer,DTH Bits,M/F Rods,Chiesl Points,Precision Parts.
- Address:457-1 Bangsan-dong,
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