Solidworks is 3d design tool for creating 3d models and drawings. Solidworks is a CAD computer aided design software. Solidworks is primarily use for mechanical engineering purposes involving design and analysis.
If you want to know more about Solidworks 2008 or .sldprt part files, here is a link to the Solidworks homepage. http://www.solidworks.com/
Visit the PropellerCode.com Solidworks 3D Models page for free Solidworks models of the hardware models and electrical models you need for building your custom robot.