The blades provided a clean and streak-free wipe ... quality hook adapter that is compatible with 9x3mm and 9x4mm hook wiper arms. The built-in flexible asymmetric spoiler prevented lift-off ...

Align the new wiper blade with the hook on the wiper arm. The curved side attaches to the metal. The flat straight rubber edge faces out. Slide the wiper blade up onto the hook-slot connector ...