The SMC Advance Tech HX Pulley is a double pulley with an integrated cam that provides immediate progress capture without the need of prusik loops. The all-in-one frame and cam design presents a compact form factor. Stainless pins retain the rope when a rigged sstem is packed so that system can be pulled out and used immediately. Manufactured from high quality aluminum and anodized to help prevent corrosion. The Advance Tech HX will support rope diameters from 7 mm up to 12.5 mm. The Advance Tech HX is ideal for all rescue applications where a small mechanical advantage system is being utilized. Certified to meet NFPA 1983 (2012 edition) Technical Use auxiliary equipment requirements.