“Topping” driveways when there is already a base, been known for use under bricks and patios as well. Mix of 2/3 #1 Stone and 1/3 Stone Dust. Compacts well to better hold the stone on the driveway. ... A very dirty Crusher Run 1 1/2 minus 20% on #200 sieve (dirt and dust). Compacts well. Will mud up on a wet day. Easy to handle.