Blasting nozzle designed for a 1/4" (6.35mm) quick coupler. Ideal for quick exchange of spray nozzles and spray guns. It delivers a very concentrated stream of water. Care should be used to avoid gouging wood or damaging fragile surfaces. Uses: Removing weeds form sidewalk cracks, stubborn mineral stains and chewing gum from concrete, masonry, aluminum and steel, caked mud from equipment and cleaning lawn mower undersides. Connects to all of the most common pressure washer equipment in the industry. 4,000 PSI.