Since we, Dongwoo co., Ltd, have been paid highly attention from the customers by manufacturing and supplying small sized Down-The-Hole Hammer and Bit for Water Well drilling and Spring development use.

Dongwoo co., Ltd, a specialist of producing Down The Hole Hammer and Bit with its accumulated know-how and the highest technology, has been supplying big sized diameter Hammer and Bit since 1990 to number of construction sites.

Dongwoo co., Ltd, moved to present Hwa-Sung industrial Complex for factory expansion and the settlement of quality control system of whole process at March, 2008.

Our products have been receiving good reputation from not only domestic clients but also USA, Japan and Hong Kong customers as well, by providing on time delivery, fair price and responsible after sale services.

We hope our realization of applying reasonable price and satisfied quality will be your good business partner.

Finally we are sure that we are willing to work up for the satisfaction of our customers and their happiness with prosperous in the twenty-first century. Again we are very thank you for your kind visit on our web site.


2008 Mar. Expanded and moved the factory (Hwaseong industrial Complex)

2006 -May. Registered patent (Multi Cluster Hammer) Reg. No. : 10-0585396
-Aug. Registered Shape of Similar Design (Bit Shape for Air Hammer Drilling)
Reg. No. : 390510 Similar No.01
-Aug. Registered Shape of Design (Bit Shape for Air Hammer Drilling)
Reg.No. : 390510

2005-Aug. Registered Utility Model (Multi Cluster Hammer) Reg. No. : 393755
-May. Registered Utility Model (Multi Cluster Hammer) Reg. No. : 352591
- Registered Utility Model (General structure of Bit for Air Hammer) Reg. No. : 373395

1990-Aug. Registered patent (Bit for Air Hammer) Reg. No. : 231472
-May. Established DongWoo Machinery Co., Ltd & DongWoo C&M Co., Ltd.

Thank you.

DONG WOO CO., LTD.
CEO CHOL GYU, KIM