Black Diamond ATC Guide Review

The performance difference between the ATC Guide and Petzl Reverso is closer than we could have imagined. Both devices are smooth and reliable when belaying a leader or rappelling. They're also reasonably priced and durable. The differences amounted ultimately to only weight and auto-block resistance. Although the Reverso is lighter, over the lifespan of either device, we believe the ATC Guide's lower auto-block friction will save most users some energy. For this reason, we've named the ATC Guide our Top Pick for Multi-Pitch climbing.