Another important factor on selecting the right trunk injection is ease of operation. There is no mixing at job sites using ArborSystems trunk injection system. So no spilling! The Wedgle is a closed system. The self-sealing chemical packs and sealed injection system virtually eliminate exposure concerns. You can inject in any position. No caplets to guard or retrieve. The couplers lets you change chemical packs quickly or snap on a different injection tip that treat virtually any tree, conifer or palm. Have a question in the field, we offer complete training, use and maintenance videos online. For more information, click here.