Okay, this is not necessary but I think it’s convenient to keep all the tools that’s included with your BikeErg along with a few other tools located in one place instead of throwing them in your tool box black hole. This location doesn’t get in the way and you really don’t notice it. I used a Velcro sticker dot on the back end of the bag while wrapping the straps around the front post. Currently, I’m testing different saddles every few days still searching for comfort and I just got tired rummaging through the tool box every time.