AeroFlex Premium Glider Upgrade Attachment for Aero-Flex Equipped Trimmers - No More Strings or Lines - #1 Option for Durability and Efficiency when Cutting Grass MUST HAVE THE AERO-FLEX UNIVERSAL TRIMMING SYSTEM TO USE THE GLIDER SUPPORTIVE: Ground supports trimmer through Glider, Relieves operator from trimmer weight FUNCTIONAL MOWING: Controls even mowing height, Multi-directional Lawn mowing and trimming COST EFFECTIVE: Visual color plane adds control to trimming, dependable and rugged, increases line/blade life 100% GUARANTEE: We are the direct manufacturer of this product and stand by it 100%