Petzl ID'S Petzl I'D S There are minor scratches from use, but there are no problems with its functionality. I used it for inspecting climbing walls. Excerpt from the internet: The self-braking descender "I'D S" is designed for work at height and rope access work. The ergonomic handle allows for comfortable descent control. The anti-panic function and the anti-error catch reduce the risk of accidents due to user error. The auto-lock system allows you to easily stop at your work position without operating the handle or tying off the rope. Even when locked, you can take up slack in the rope without operating the handle. The safety catch allows the rope to be attached while the device is connected to the harness. The "I'D S" can be used with ropes with a diameter of 10 - 11.5mm.