Product Info The CMC Ascender utilizes a spring-loaded cam to facilitate progression on life safety rope. Widely used by rescue teams for ascending rope, as an attachment to a litter harness tender line, as a travel restrict rope grab, and other applications where a mechanical ascender provides greater efficiency. Key Features Compact, lightweight design Machined from aircraft-grade aluminum alloy for superior strength Spring-loaded cam produces instant progress capture Removable pin releases cam, facilitates easy installation at any point on rope Large connection point in cam accommodates rescue-sized carabiners Stainless steel quick-release pin Designed for optimal rope strength Made in USA Specs WEIGHT DIMENSIONS COLOR NFPA RATING 8.8 OZ (252 G) 4.5” L X 3” H X 1” W RED / GRAY 7/16 –1/2 IN (11-13 MM) – TECHNICAL USE; 1/2 IN (12.5 -13 MM) – GENERAL USE