MCR TK110 Crews Tomahawk Safety Glasses Black Frame Clear Lens, 1 Pair Sold as 12/BX. Lightweight safety glasses with a scratch-resistant, polycarbonate, wraparound lens. Fully adjustable temples with ratchet for custom fit and one-piece lens with integral side shields. Filters 99.9% of UV rays. Direct ventilation. Duramass scratch-resistant coating.