BuyBocceBalls is a family owned business, located in Northern California. Thank you for your business! Har-Tru Tread Blaster Cleans all types of shoes Keeps tops of shoes dry Easy to use The Har-Tru Tread Blaster is an essential tool for clay court facilities, designed to quickly and effectively remove dirt and grit from shoe soles without getting the tops of your shoes, socks, or pant legs wet. Easy to install, all you need is access to water and a hose with a spigot that provides a pressure of 30 to 60 psi. You'll be happy you made the investment.