AutoCAD 3D Practice Drawing for Loft Command | AutoCAD 3D Mechanical Drawing Modeling Bottle & Screw Driver. This tutorial shows how to create 3D mechanical object such as screw driver & bottle step by step using Loft command in AutoCAD 3D. Other AutoCAD commands used in this tutorial are rectangle, circle, move in z axis, loft, line in inches, units, fillet, revolve, presspull.