The Momentum Package includes all the essentials you need for the vertical world. With everything you need to get started in the gym or at the crag, the Black Diamond Momentum Package is a complete, convenient package for all-around climbers, featuring our most popular harness for all-around use, the Momentum. Momentum harness. ATC belay/rappel device. Rocklock Screwgate locking carabiner. Mojo chalk bag. BD White Gold chalk.