The Pro Key features a new precision blade tip that allows access to the tightest spots, as well as a wire snap carabiner at the top for easy attachment to your climbing harness. Additionally, it has a one-piece folding roof that provides a larger surface area for strong palm pressure. The large holes keep the weight low. Finally, the Pro Key loop comes exclusively with an extendable, removable, and flexible loop that can be clipped to your climbing harness to prevent loss in extreme positions.