DMM Bug

Summary: The DMM Bug is a thick-walled, durable unit that excels when you’re belaying with skinny ropes, either single or double. The narrow channels of the tube make it easier to lock off thin cords. However, this performance comes at a price, as it was extremely difficult to push 11mm ropes through the channels. In a few cases, we weren’t able to fit one in at all.
Pros: Excellent for skinny single ropes, and double ropes.
Cons: Doesn’t accommodate thick ropes.