The rescue figure 8 descender from Climbing Technology of Italy has ears which are designed to prevent the rope from slipping up to the top and forming a girth hitch which can strand the rappeller until they can remove their weight from the device.

MBS:  40kN

Material:  Hot forged aluminum alloy

Rope capacity:  For use with ropes 10mm to 13mm

Weight:  250 grams

Source:  Italy