Introducing the Massive Novelties Bundled Extending Knob! This product includes the following: -3D Printed Clip-Replacement Nut-Threaded Knob This 3D printed clip can be easily attached to any existing MN Extender - from the OG Frankenstender to the DIY to the APEX 2.0. It can very easily replace the existing hook on the crossbar of your MN Extender. Please see the photos below for a video demonstration on how to replace the hook on your current extender. We are going to offer this product as an aftermarket modification that can be installed by the user. It will also be sold as an add-on to new purchases where, for a small fee, we can install it for you.  *Get an automatic discount on the Clip-on Bundled Extending Knob when purchased with the new Calibrated Spring System!*