I've been climbing for most of my adult life. But one day, while climbing near Denver, I took a huge fall on a bolt that was loose and the bolt came entirely off the wall. This made me fall about 20 feet before the rope went taut and I nearly seriously injured myself. So I decided to do something about it. The Crank Brush is a climbing tool I invented to help make climbing safer. It's a climbing brush, which people already bring on their chalk bag, but with the added utility of being capable of tightening loose bolts on sport climbing routes. I taught myself enough CAD to create a 3D model, did extensive research on chemicals and moulding, and then I worked with a manufacturer in China to actually produce it. It was successfully funded on Kickstarter, garnering attention from climbing pros like Jonathon Seigrist, as well as Climbing Magazine. I raised $5,000 and I now sell them online and in local climbing shops.