Hook wrench: also known as the crescent wrench, commonly known as hook wrench for twisting the thickness of the restricted flat nuts; dedicated to the dismantling vehicles, machinery and equipment of the round nut, the slot is divided into rectangular and circular card slot tank production process: Use high-quality forged steel high temperature, high strength, wear resistance of the outer diameter of the scope of the nuts:. S: 22 ~ 26 S: 28 ~ 32 S: 34 ~ 36 S: 38 ~ 42 S: 45 ~ 52 S: 55 ~ 62 S: 68 ~ 72 S: 78 ~ 85 S: 90 ~ 95 S: 100 ~ 110 S: 115 ~ 130 S: 135 ~ 145 S: 150 ~ 160 S: 165 ~ 170 S: 180 ~ 200 S: 200 ~ 220 S: 240 ~ 260 S: 260 ~ 280 S: 280 ~ 300 S: 300 ~ 320 S: 320 ~ 350 S: 360 ~ 380 S: 380 ~ 400 S: 400 ~ 420 Special tools: the introduction of German technology, in line with the German DIN7444 standard (GD / T4388-1995, GB / T4389-1995, GB / T43390-1995) using high-quality alloy steel, die forging forming a workpiece by forging and by 630-1600T large Mount calendering together. Tool steel tools than precise size, tensile strength, abrasion resistance and good. Hook wrench Surface treatment is a surface-black coating, which is a surface coating of gray hammer handle. Chromium steel products mainly include: double plum, wrench; percussion plum, high-neck pry bar wrenches, American high neck tap wrench, wrench; convex type wrenches; single head plum, wrenches, socket wrenches ratchet wrench, hook spanner, hex wrench, tap wrench exterior design meets German DI133 standard tap wrench exterior design standards in line with DI7444, exports more than 30 countries and regions, the company, is the largest special tools professional manufacturers, is located in City of Hebei Province Economic and Technological Development Zone. The Company location, convenient transportation, the Beijing-Shanghai high-speed, 104 National Road running north and south, east and Huanghua Port, the Beijing-Shanghai railway to pass. Manufacturers Tel; 15631773738