For more information on the Turbocast 300™ Salt Spreader or to buy, please visit https://uk.glasdon.com/winter-safety-... Turbocast 300 Gritter spreads dry, damp or wet grit/salt mixture. With its adjustable wide-spread spinning action, Turbocast 300 Gritter spreads to a width of between 3 and 7 metres with minimum effort.