Karcher FR 50 Hard 500MM Surface Cleaner 2.640-679.0Karcher FR 50 Hard 500MM Surface Cleaner 2. 640 679. 0 The FR 50 Surface Cleaner is a robust, hot water resistant attachment designed for efficient cleaning of large areas. It features a durable stainless steel housing and a wide 500 mm working width for increased productivity. Key features include double ceramic bearings for enhanced durability, a convenient push handle for easy operation, non marking swivel castors for smooth movement, and an