The Harken Safety & Rescue Ninja Ascenders makes Rope Access and Rescue easier because it reduces rope drag to the lowest of any available ascender. This means that there are smoother and easier first steps because you don’t have to counterweight the rope or reach down to pull the rope through the unit – resulting in increased productivity. The entry fairlead maintains correct rope alignment. Unlike every other ascender on the market, Harken Safety & Rescue’s dual cam system, based on Harken’s marine Cam-Matic ball bearing cleats, applies pressure to both sides of rope simultaneously. This provides more thorough holding power and even force than competitive designs whose cams act on just one side of the rope against a fixed wall on the other side. Other ascenders use an aggressive barbed single cam that can create additional drag on the line or damage the rope cover.