These ascenders are designed to be used with 14-19 mm rope. Gibbs ascenders are different than other ascenders, requiring two hands and a bit more involvement to install and remove from the rope. They are designed not to slip in extreme conditions, such as extreme mud and ice.
This #4S model is intended for rescue and rigging. It has a stainless steel shell and utilizes a spring loaded cam system to keep the ascender in tension when climbing rope.
Warning: Not for use on Steel Cable or wire rope. NEVER use as a rope grab device or for fall arrest, you will cut your rope!
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