This is cad data download service produced by CADENAS WEB2CAD,Inc. This service can provide designer 2D and 3D data for mechanical parts.
You can use this service free, if you register. Off course, the fee for register is free. So this service. This service is under the cosponsorship of many suppliers.
Engineers Require "NATIVE" Data
It is possible to download native data for each cad system. Your job gets easier when you use Machine Design CAD Models.