Bosch Clear Advantage Wiper Blades Feature A Patented Beam Design That Reduces Exposed Metal, Resisting Ice And Snow Build-Up For All-Weather Performance Graphite Treated, Natural Rubber Wiping Edge Reduces Friction For A Quiet And Smooth Wipe In All Seasons Easy Installation With The 'Click-On' Adapter System That Fits Pin Arm (4.8Mm/6.35Mm), Hook Arm (9X3Mm/9X4Mm), Side Lock (22Mm), Pinch Tab, Top Lock (16Mm/19Mm), And Bmw Top Lock Wiper Arms Aerodynamic Wind Spoiler Improves Airflow While Creating Additional Downforce To Hold Blade Firmly Against Windshield, Preventing Blade Lift-Off WINDSHIELD WIPER BLADE