The original Kootenay knot passing pulley was proposed by the legendary Arnor Larson in the late '80's and was made by Rock Exotica. Two holes for tag lines, a dual bearing and other features make the Kootenay Ultra the most advanced pulley of its type.

- Extremely compact and lightweight, while maintaining same capacity of larger Kootenay-style pulleys.

- Simplifies high-strength tie-off with a single locking screw, stowable within the axle.

- Uses two independent sealed ball bearings for increased durability and efficiency.

- Two additional holes to separate tag lines and hoist lines, helping prevent spinning of the load and interference with connectors.