Doop Tools (Shanghai) Co, . Ltd., located in the centre of prosperous Shanghai, China, specialized in torque wrenches and hydraulic tools, which is created by a group of professional and experienced experts in the field of heavy bolt tightening &loosening industry. These tools can be widely used for construction, mining, oil and gas, railway, shipbuilding etc. Doop devotes to exporting China's delicate tools to the global market. We provide tools for distributors all over the world with the most competitive product with, at the same times serving as a platform for creating value with joint effort of all cooperators including suppliers, clients, staff, end-users and related supporters. More and more international cooperators are joining in Doop big family constantly on the base of Doop's spirit of cooperation and dedication.