What Is a Pipe Wrench?

A wrench is a commonly used installation and removal tool. It is a hand tool that uses the principle of leverage to turn bolts, screws, nuts, and other threads to hold the openings or sleeve holes of bolts or nuts. Wrenches are usually made of structural steel made of carbon or alloy.

1. Chrome-vanadium steel: The chemical symbol CR-V is of better quality in steel; Carbon steel: average quality, more market circulation ^[1]

There are basically two types of wrenches, dead wrenches and adjustable wrenches.

Manual wrench, also called ordinary wrench, is mainly used in ordinary life and work. Its use is relatively simple, mainly divided into single-headed wrench, double-headed wrench, adjustable wrench, plum wrench, multi-purpose wrench,

Uses and technical characteristics of open end wrenches

1. Bright chrome: bright like a mirror; 2. Matte chromium: matte; 3. Electrophoresis: black, with brightness, under the action of external direct current, the charged particles will be directed toward the cathode or anode in a dispersed medium to promote the separation of substances; 4. Phosphating: black, but with a dark luster, immersing the substance in the phosphating solution, depositing a layer of water-insoluble crystalline phosphorus on the surface of the stool, is a process of conversion of hydrochloric acid. 5. Gray nickel: It is a new surface treatment method with strong anti-rust ability and will increase the service life of the product. 6. Other treatments include blackening, nickel-iron alloy, pearl nickel, black nickel and titanium plating.

1. There must be no rust, burrs, cracks, spots, etc .; 2. 2. Symmetry of the trigger, laser lettering should be clear; 3. 3. The hardness must meet the specified standards, and the card position must be accurate. The turbine of the adjustable wrench must be flexible, and the pin cannot be loose. ^[1]