Pre-installed hook adapter with 98% coverage hook and side pin applications allows for quick and easy installation Patented 3D spoiler design includes 3-point design controls wind force for enhanced high-speed wiping performance Exclusive wear indicator changes from black to yellow over time to remind you when to replace worn blades Tec2 synthetic rubber formulation with coating offers long lasting, all weather durability Size lengths available ranging from 14 to 28 inches