Here's what other sites are saying:
Built for heavy-duty and rescue work, the Rescucender's spring-loaded design helps prevent damage to rope under shock loading.
On Sale. Free Shipping. Petzl Rescucender Ascender FEATURES of the Rescucender Ascender by Petzl Removable axle can be used to install or remove the clamp at any point on the rope Locking pin: reduces the risk of undoing the system accidentally
Made for rescue work, the Rescucender ascender from Petzl is designed to minimize rope damage under shock loads.
- Mountain Gear
Description of Petzl Rescuender Rope ClampIntended for moving on fixed ropes as a back-up belay, for hauling heavy loads, and as a progress capture device in hauling systems.FeaturesSlides easily up the rope and jams when the cam is loaded. Slides easily downwards if the cam is prevented from engaging. If overloaded or subjected to an impact force, the rope may slip through the device. Locking pin gives greater safety disconnection from the rope requires two separate actions.Certification - CE EN 567 Individually tested. For use on single rope from 9 to 13 mm in diameter.250 g
- US Outdoor Store