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. The ATC can now be ordered in specific colors. 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 Available for order by individual color