Oakley has improved its Taperlock technology with the launch of Oakley Spike/Soft Spiken, Why 4 and Split Thread frames. The system involves making holes in two stages by milling the lens together with the patented holding screw, spreading pressure evenly. It is also designed to reduce warranty claims. Equally, the system blocks the screw securely without adhering to the hole so that there should be no possibility of the lens loosening. The same screw is used for all ophthalmic corrections.