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.
Rope diameter range (mm)9 – 13
(MBS) Minimum Breaking Strength (kN)80
(MBS) Minimum Breaking Strength (lbf)17985