Design and Details Ideal for systems using a 10.5mm or 11mm EN1891 type A line. Employing a toothless mechanism to reduce possible damage to the rope, this device is one of the least aggressive on the market for textile ropes . Supplied with an OVALONE CARBON connector, it can even be used without a lanyard or energy absorber. It features a selector lever that allows you to choose between two modes of use: free sliding along the rope in both directions or upward sliding only, which allows the user to reduce the fall factor. It may also be used as an ascender or as a rope clamp for rescue systems.