DMM Revolver Screwgate Carabiner with Pulley Sheave saw It is intended for accessory

It is intended for accessory use — tool lanyards and chest harness connections — rather than as a primary load-bearing connector

What does the fiberglass pyramid insert do

Its spring-loaded cam moves effortlessly up the rope and locks firmly under load

Without the twist

Insert: Steel

DMM Revolver Screwgate Carabiner with Pulley Sheave saw It is intended for accessoryDMM Revolver Screwgate Carabiner Integrated Pulley Sheave The DMM Revolver is one of those pieces of hardware that quietly makes your rigging system more efficient every time you use it. The integrated pulley sheave at one end of the carabiner dramatically reduces rope friction compared to a standard carabiner redirect making it a go to choice for mechanical advantage systems, speed lines, and hauling setups where friction is the enemy of efficiency.