Blast from 2015 to when the USAR (Urban Search and Rescue) tested the TRAXX Monkey Fist Concrete Lifting Device. Learn more about how to lift 2,948kg. USAR (Urban Search and Rescue) testing out TRAXX Monkey Fist quick lifting tool on a 2 tonne concrete block. Totally reusable, easy to install, and quick to release. Critical factors in rescue Operations.