The Tree-Mate-O (Tree Support System) promotes proper tree development and stronger trees, increases caliper with improved taper and form. Trees will establish superior root strength in one growing season which will help them withstand high winds. The Tree-Mate-O Saves labor and time (under 2 minutes staking time) Reduces girdling, maintenance and liability Adjustable, Long Lasting & Reusable Attaches securely to a single green "T" or light duty "U" post, or 7/8" square wood post For all type trees up to 2 1/2" in diameter Durable EPDM rubber band included to gently cradle tree.