Best SEEK OPTICS Replacement Lenses Oakley CRANKSHAFT - Black composite Non-Polarized SUNGLASS FRAME NOT INCLUDED, Fits Oakley CRANKSHAFT, Non-Polarized, 100% UV400 Advanced Black, Versatile lens tint & great color perception and anti-fatigue qualities perfect for sunny environments. Best for medium to bright light conditions. Perfect for driving, baseball, tennis, football, soccer, water sports, and all other outdoor activities SUPERIOR LENS TECHNOLOGY: The entire line of Seek Optics lenses use an advanced Nano-DSX technology developed in Japan. Using a special hard coating, and a double-sided dip-coating method, we achieved an excellent anti-oil prevention (oleophobic) which makes our lenses extremely easy to clean. IMPACT RESISTANT - Exceeds FDA Safety Standards, ANSI Z80.3 and EN 1836:2005 Standards. Seek Optics hard-coating uses Wrap-Coating Technology. The surface of our lenses has a super-hard wearing protection layer and enhanced lens surface hardness which extends the service life of the lenses. Seek Optics hard-coated lenses with our wear and tear resistant surface do not easily scratch or crack. DISCLAIMER: Seek Optics is a manufacturer and distributor of replacement sunglasses lens only and does not offer, market, or sell replica or counterfeit products. Seek Optics is not affiliated with Oakley, Ray Ban, Costa Del Mar, Ray Ban, Rudy Project, Spy Optics, Von Zipper, or any other manufacturers mentioned on this site. All references to the aforementioned trademarks or brands on this website or elsewhere belong solely to said respective trademark owners.