Tap wrench for petroleum, chemical, metallurgy, power generation, oil refining, shipbuilding, petrochemical and other industries, equipment installation, plant and equipment maintenance, maintenance work necessary tools. Tap wrench is divided into two kinds of metric and imperial. No. 45 using steel or 40Cr alloy steel forging overall production. Tap wrench manufacturing standards: GB / T4392-1995 wrench is the most common style is hitting the tail end product, one end fixed size openings for wrenching certain size nut or bolt. I plant in products, such as the character of the business philosophy, always adhere to demanding product quality, innovative products through (300KN-1600KN) large-scale friction forging presses, and through X-ray detection test, leading international quality. I plant a variety of customized shaped wrench, welcomed the new and old customers to order call us. Long http://www.hbbtglj.com/tzbs/