Symmetrical wind spoiler uses air flow to increase blade-to-windshield contact and shields tension springs from all weather elements for exceptional performance in even the worst weather Patented bracketless design better resists ice and snow build-up for better performance and visibility in all weather Precision-tensioned dual steel springs create tension memory, applying uniform pressure along the entire blade length for crystal-clear visibility Precision-cut, specially blended rubber wiping edge removes even the smallest droplets for clear visibility and safer driving Double locking connector offers quick, easy, and secure installation on many popular wiper arm types: Hook, Pin, Side Lock, 16mm Narrow Top Lock, 19mm Large Top Lock, Pinch Tab