BIN-2.5 are long distance dental loupe style Magnifiers with 2.5x Magnification. Worn like glasses, thus leaving the hands free and providing magnified long distance vieiwing. The BL-2.5 has high quality coated multi lens optics at a reasonable price. Includes interpupillary (IPD) and nose bridge adjustments, and has a aluminum lens frame, comes with a padded carrying case and eyeglass lanyard to hold the loupes on when your looking down.