ISC manufactures an extensive range of Ascenders and Descenders for use on a wide variety of ropes. 

The Rescue figure 8 devices have extended side bars to keep the rope in place, preventing the rope from creeping inwards and causing unwanted locking.  

Technical Information

Rope diameter range (mm)9 - 13
(MBS) Minimum Breaking Strength (kN)35
(MBS) Minimum Breaking Strength (lbf)7868
Serial numberingAvailable on request