SRTE Ascenders and Specialised Ascenders are especially designed for ultimate strength and durability. The bodies are machined from extruded aluminium and are anodised gold, black and red for corrosion protection. The cams are investment cast in stainless steel. The teeth and cam face curvature were specially designed to do the least damage to the rope while maintaining maximum strength. The tooth pattern channels away most of the build up from dirty rope; you can easily remove any remaining build up manually. Additional rigging holes on the top and bottom of most models prevent karabiners, lanyards, foot loops and other equipment from tangling, keeping your system in a state of high readiness.