1. Bright chrome: mirror-like light; 2. Chromite: dull; 3. Electrophoresis: black, brightness, repair hydraulic wrench, in the role of external electric, hydraulic wrenches, the charged particles in the dispersion medium force to the cathode or anode do directional movement, prompting the separation of substances; 4. Phosphate: black, manual hydraulic wrench, but glossy dark, the material is immersed in the phosphating solution, the toilet surface deposition layer of water-insoluble crystalline phosphorus, hydrochloric conversion process. 5. Grey Nickel: is a new surface treatment, hydraulic spanner, antirust ability, and will increase the product life. 6. Others include black, pearl nickel and titanium and other treatment preset torque wrench features and usage First, the characteristics 1, with preset torque value and sound equipment. When the fastener tightening torque reaches a preset value, can automatically send a signal "click" (click) is heard, accompanied by significant feel vibration prompts to complete the work. After the lifting of the force, the relevant parts of the wrench can be automatically reset. 2, switch two kinds of directions. Steering switch dial ratchet wrench counter-clockwise afterburner. 3, male, English (Nm, lbf.ft) double tick; handle differential mark. Reading is clear and accurate. 4, alloy steel forging, durable, long life. Calibration traceable to the National Institute of Technical Standards (NBS). 5. Accuracy in line with ISO6789: 1992.ASMEB107.14GGG-W-686 ± 4%.. Hydraulic wrench factories, Lu a CNC precision tools, hydraulic wrenches by Unruh, Dongguan City, a business unit of CNC precision tool. Unruh Dongguan City operation of a CNC Precision Tool (www.luyidaoju.com) is Dongguan, metal molds leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lu led a CNC precision tool with the staff warmly welcome all inquiries negotiations to create a CNC precision tool Lu better future.