Wear your Oakley Crankshaft Polarized Sunglasses. Double-thick Plutonite lenses with HD polarization provide distortion-free vision even in the strongest bright light with full spectrum UV protection and polar ellipsoid geometry for peripheral clarity they are a set of glasses suitable for any environmental conditions. And durable The impact-resistant O Matter frame features Oakley's signature three-point fit for all-day comfort in a unique, fashionable package. Place the pedal into the crankshaft.