GNT-2.5 Large 3.8" inch Gooseneck Magnifier with cast iron table clamp base and 2.5x glass lens makes it an ideal work and hands free magnifier this design is ideal for reading, inspection, sewing, soldering, threading, polishing. The 18" inch gooseneck feature allows for unlimited angle adjustment for the ideal working angle. Table Clamp base makes it one of the easiest Flexible Stand Gooseneck hands free magnifiers to use and mount .