Tap wrench is the most common wrench, wrench and other products is the product of the barrier to hit the tail end. Twelve holes of the working end angle for the work space is small, can not use ordinary wrench occasions. Used to tighten the hex head bolt or a nut. Corner small, only a small swing angle can be used to place (just turned Wrench 1 / 2 rotations), and because access solution is large, can be used to tighten the strength of large industrial hammer wrenches for oil, chemical industry, metallurgy, power generation, oil refining, shipbuilding, petrochemical and other industries. Installation of equipment, fixtures and equipment maintenance, repair work necessary tools. Tap wrench into metric and imperial two. Tap wrench of material: 45 # carbon steel or alloy steel 40Cr overall forging production. Tap wrench manufacturing standards: GB/T4392-1995. Wrench shape designed to meet DIN7444 standards, products passed ISO9001: 2000 quality system certification, the tools of production, supply, sale strict management. Products by X-ray detection machine inspection, strict internal quality assurance of products