In order to support the increase in demand and modernization of worn-out devices used regardless of the model and its construction, they can use the replacement plan of portable metal hardness tester products of this company up to 03% (30%) discount.Obviously, the delivery of portable hardness tester of worn metals is a necessity of using this design.It is worth mentioning that another plan to replace worn and old microhardness devices with the deviceNew microhardness (all motorized and computer) manufactured by the company is under review.