The Black Diamond Big Air XP Package Belay is a two item package you'll need for belaying and rappeling. The mini Pearabiner is a screwgate, locking carabiner while the ATC-XP is a belay/rappel device. One purchase, two items in your climbing kit.
So sorry, but only 4 items are allowed for comparison, so we're comparing the first 4. I blame the gnomes and so should you.
Would you like to compare the products you have selected now?