The Notch Fusion Rope Wrench Tether has a rigid hot forged aluminum construction that resists twisting or bending. Streamlined and lightweight designed to be the last wrench tether you will ever need. Features include: An incorporated rope wrench stopper for optimal orientation. Multiple SRS ascent attachment points and a secondary attachment point for auxiliary climbing system. Compatible with SRS climbing system with 2 dedicated slots for a micro-carabiner. The carabiner hole is also larger and rounded on the inside for improved carabiner alignment and interaction. Rope diameter range for integrated pulley: 11-13mm. MBS: 23kN (Body), 8kN (Pulley). Pair with favorite hitch cord (recommend HMS carabiner). This is the Rope Wrench Tether to have!