Every climber should have a tube-style device: Use them for belaying and rappelling. The ATC-Guide offers two friction modes (one side is standard; flip it over for extra friction when you’re learning to belay). Plus, it works with almost any size rope. The auto-block allows you to set this device up on the anchor, then belay your following climber, which adds a lot of stopping power.
$30; 3.1 oz.