The Petzl Toolink allows you to attach tools to your (climbing) harness, even if they don't have a built-in attachment point. With the included Tool-Tape, you can create a setup that ensures tools like hammers can still be securely fastened. The Petzl Toolink S can support tools weighing up to 2.3 kg. *For a strong and secure connection using the Tool-Tape, the surface of the tool must be smooth.