Feature: 1. The product is handheld design, easy to use, portable and convenient. 2. Put the Specimen in and you can use it, with high efficiency and good reliability. 3. Mechanical regular design, compression spring detection device, tightly connected assembly, not easy to damage. 4. Independent dial, built-in shrapnel type force transmission, intuitive and clear readings, accurate measurement. 5. Used to measure the hardness of metal, such as cold rolled steel plate , stainless steel, etc. Specification: Item Type: Hardness Tester Model: W-B92 Material: Iron Application: Metal hardness measurement Range: 0~20HW Accuracy: 0.5HW Applicable Material: Cold rolled steel plate, stainless steel Hardness Range: 50-92HRB Specimen Thickness: Approx. 0.6-6mm / 0.02-0.24in Specimen Inner Diameter: Approx. ??10mm / 0.4in. Package List: 1 x Hardness Tester1 x Hardness Block1 x Spare Indenter1 x Wrench1 x Screwdriver2 x Key1 x Manual1 x Carrying Case Note: This instrument is a precise instrument, and its service life is mainly determined by whether the method of use is correct and whether the maintenance is timely and proper. Pay attention to the following points in use:1. Prevent contamination. This instrument should often be cleaned with the soft cloth to remove the dust and dirt on the surface of it, especially on the anvil and supporting surface of the cylinder. Specially prevent the dirty things to get in from the dial seams or indenters, otherwise, the filthy things from those parts might influence on the testing accuracy or cause malfunction.2. Prevent rust. Although all the parts of instrument have been treated to prevent rust, the improper maintenance or long time of use on the production spot without paying attention to maintenance may also cause the rust to some components. When using it, pay special attention to its waterproof performance except clean it frequently, because many parts will bear rust with water, the water in the dial may cause deadly rust to make the instrument useless.3. Prevent falling off. This instrument is made up of many accuracy components, falling off of it will result in the permanent damage to some parts.