Often copied but never equaled, the Black Diamond ATC provides lightweight and durable belaying and rappelling performance anytime, anywhere. This classic design features a large surface area that dissipates heat when lowering or rappelling, and the smooth-handling geometry accommodates rope sizes from 7.7 mm to 11 mm.
Did you know that ATC stands for Air Traffic Controller? Originally, Black Diamond had a specific belay device product named the "Air Traffic Controller", and this design was so popular that every other belay device that followed the same design, regardless of brand, ended up being called an ATC.
Unique, smooth-handling geometry
Minimalist design is durable in all conditions
Large surface area dissipates heat when lowering or rappelling
Handles ropes from 7.7 to 11 mm
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