Woodmates Telewash Deck Prep Tool, Water-Fed Cleaning & Prep System, For Wood Deck Stain Prep, Won't Damage Wood, Stiff Bristle Brush Gently Removes Stubborn Dirt While The Water Washes It Away, Attaches To A Standard Garden Hose & Has An On/Off Valve To Adjust The Water Flow & Help Conserve Water, Cleans Under Deck Rails, Gets Into Corners & Helps Remove Debris, Use For Cleaning Patios, Concrete Surfaces, Mold Off Bricks, Etc.