The Vortex Optics Razor HD 12x50 Roof Prism Binocular features a magnesium chassis that decreases the weight and increases the strength. With a well-earned reputation for pushing the limits of optical performance, the Razor HDs step up and out on other binoculars in their class. The Vortex Optics Razor HD Binocular is small, light, bright, strong and packed with the best quality, hand-selected prisms and premium HD extra-low dispersion glass available today. The multi-position eyecups allow you to twist up and down to precise, intermediate settings to maximize custom fit for comfortable viewing with or without eye glasses. Nothing else comes close to the Vortex Optics Razor-HD 12 x 50 Binocular.