The quick easy and chemical free way to clean up your patio or drive this complete set is perfect for clearing moss algae weeds and dirt from between your paving slabs bricks walls and barbeques now is a great time to clean away moss which can get really slippery from paths before it spreads in the wet winter months the longer wire brush will effortlessly scrape away grime from your slabs while the triangular profile bristles will easily get into those tricky areas between each block