3D Robotics EX11A 3DR Solo Leg Extensions (Black) Easy snap-on design for quick attachment and removal without need for screws or possible damage to your OEM Solo Legs Foldable design that collapses the 30mm extension down to just 10mm for easy storage with any existing Solo bags or cases Incorporates a simple 'click-to-lock' mechanism to ensure that your foldable legs stays in place when in flight and when in travel All Solo Extenders are printed 100% solid to withstand robust usage