I took a huge fall on a bolt that was loose while climbing in Clear Creek Canyon and nearly wrecked 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. It was successfully funded on Kickstarter, raising $5,000 and now I sell them online and in local climbing shops.