The W series of portable instrument performs on-site hardness test on aluminum alloys. The test result is obtained with a simple clamping of the two handles. It is convenient, efficient and reliable and tests aluminum alloys mechanical performance in accordance with American standard ASTM B 647. It is ideal for quick test of hardness on aluminium profiles, tubings, sheets, accessories and other soft metal, non-destructive on-site 100% final products qualification test. The W series Webster hardness tester can be also used for testing hardness of copper, brass and soft steel. The Indenter is Re-engineered with advanced material and new production technology manufactured, higher hardness, long service life, good interchangeability. The Indicator Hand has High strength indicator hand, less likely to be bent by long-term using or mis-operation. The Dial Glass has great strength, toughness, uneasy to be broken or scratched. Handle is made of forged aluminum alloy handle with fine anodized finishing, high resistance to abraision and stain. Hardness Blocks: Tested by standard rockwell hardness tester, the hardness block are attached with test report. Stabil ty: Stable full scale point, stable calibration point, indicator never glides. Conversion: Results can be converted to Vickers, Rockwell and 8rinell. It comes complete with main tester, Standard hardness block, Spare indenter, Calibration wrench, Small screwdriver, Carrying case, and Dial assembly. WH Webster hardness tester is a portable one hand operation instrument for on-site soft metal hardness testing. It is used to inspect the result of heat treatment, and to sort the materials in the warehouse.. The Webster hardness tester is very suitable for one by one quality inspection of batches in the production line. The hardness value can be read directly on the indicator dial. The testing is done by simply applying pressure to the handle so that the bottom is felt. W-20 A requires a specimen dimension of 0.4-13mm for thick aluminum alloy.Inner diameter greater;10mm. Hardness rangfe 25-110 HRE, 58-131HV.