Members: Falling on Teeth
![](https://www.ropelab.com.au/wp-content/uploads/2016/03/Croll-Sheath-Thumb-150x100.jpg)
Technicians regularly use toothed-cam ascenders such as the Petzl Croll. For climbing ropes, the chest-mounted Croll is normally used in conjunction with another handled ascender and foot loop. Technicians are generally taught to ensure they are also attached to this