When using, hold the handle with your right hand. The more backward your hand is, the less effort you need to pull it. When pulling the small nut, it is necessary to constantly rotate the worm gear to adjust the size of the wrench mouth, so the hand should be held close to the blank wrench lip, and the thumb should be used to adjust the worm gear to adapt to the size of the nut. When the spanner mouth of the adjustable wrench holds the nut, the fixed spanner lip is on the top and the adjustable spanner lip is on the bottom. The monkey wrench must not be used in reverse. When pulling the rusty nut, drop a few drops of kerosene or engine oil on the nut, so that it is easy to turn. When the wrench cannot be screwed, the steel pipe must not be sleeved on the handle of the adjustable wrench to increase the torque, because it is easy to damage the flexible wrench lip. Flexible wrenches shall not be used as hammers. The explosion-proof monkey wrench is calendered by a large friction press. It has the advantages of high strength, stable mechanical performance, long service life, etc. The stressed part of the monkey wrench is not bent, deformed, or cracked. When the wrench cannot be screwed, the steel pipe must not be sleeved on the handle of the adjustable wrench to increase the torque, because it is easy to damage the flexible wrench lip. The surface treatment monkey wrench has to go through dozens of processing procedures from steel to finished products. At present, there are nearly ten surface treatment methods, most of which are chromium plating and electroplating. There are also various surface treatment methods such as blackening, phosphating, nickel plating, zinc plating, black nickel plating, etc.