MFillet is a routine from Hugo Valenzuela that scripts the Fillet command in AutoCAD, allowing you to fillet multiple lines at once. The lines are filleted with a zero radius forming a corner. The lines must touch or cross, and the fillet is made leaving the two longest segments in place. Start by loading the LISP file, then type in the command MFillet. Select the lines to fillet, then press Enter to see the result. This command also works in coordinate systems other than WCS. If you need a true radius instead of a corner, you can easily modify the code to replace the 0 with your desired radius. Thanks, Hugo.