V30 Nemesis™ Polarized Safety Glasses, Smoke, Polycarbonate Lens, Anti Scratch, Gunmetal Frame Temples, Nylon ORS NASCO Evolution standard geometry is sufficient Evolution standard geometry is sufficient for most drilling applications Manufactured specifically to maximize hole accuracy while minimizing cutter vibration and extending annular cutter life Using this standard geometry enhances accuracy and saves time This allows for a single ejection of slugs when drilling through stacked material universal sealant that lubricates and seals threaded joints on water decreasing the risk of eye stress and eye fatigue Polycarbonate lenses provide 99 9% UVA UVB UVC protection Wraparound frame has a base curve of 8 that extend the range of peripheral protection