Tolerance Data is a technical database used by automotive professionals. It provides:

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A keygen, short for key generator, is a program that generates a product key or serial number for a software application. In this case, the keygen is used to activate Tolerance Data 2009.2.

Tolerance Data 2009.2 is a software tool used for tolerance analysis and stack-up calculations in mechanical design. It helps engineers to analyze and optimize the tolerances of mechanical parts and assemblies.