HL CurveTool v2.12 for AutoCAD can be used to create engineering curves using mathematical formula. A formula can be saved in a library for future reference. Editing ability is also provided. HL CurveTool also has the ability of conversion among all the curve type entities. It can explode splines, arcs and ellipses into polyline with user defined deviation tolerance. All mjor AutoCAD releases are supported include AutoCAD Mechanical. One license works for all. Free trial. [URL="http://www.hlsolution.com"]www.hlsolution.com[/URL] [email][/email] thanks! HL Solution, Inc.