Here's what other sites are saying:
Haul gear or conduct rescues in which safety and legislative compliance are required with the versatile Revolver Locksafe carabiner from DMM. You'll have an efficient pulley system with a 7075 series pulley positioned at the top of the biner while the gate employs the locksafe mechanism - making it ready for use when belaying as well.
- Mountain Gear
An innovative specialty carabiner with an integral pulley for minimizing rope drag.
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