About this 3D model
This is a geared micro stepper connector. These stepper motors come in 5vdc and 12vdc versions. They are sold by the millions, they are cheap and easy to use. The connector can be used for makerbeam (they sell other types of these -printed-). This is just a different version for you to use for anything! A template for Autocad 123d Design can be found here: http://www.123dapp.com/FullPreview/Index.cfm/ID/1694873 You may use it according to the license.