Large boars hair brush on an extendable pole with pivoting head The Trango Beta Brush Stick incorporates a large boars hair brush on an extendable pole with a pivoting head, making it easy to clean out of reach holds from the ground. Additionally, the pole collapses to only 33, making it easy to pack inside your pad. Equip yourself with the Beta Brush Stick and there will be no more worrying about grimy top out holds or cleaning out of reach tick marks.