Pedros Cable Puller Fourth Hand Tool. Sometimes the task at hand requires more hands than available. If youve ever worked with some of the more finicky bicycle brakes you know what we are talking about. Pedros Cable Puller commonly known as the Fourth Hand Tool provides the perfect tool for tensioning brake or derailleur cables while making adjustments. Featuring one hand operation an ergonomic cushioned handles and a thumb lock this tool simultaneously grips and tensions the cable while keeping your other hand free to secure the cable in place. End the frustration and pick one up. Made from Heat-treated laser cut steel and backed by Pedros lifetime warranty.