The Harken Ninja is the smoothest foot ascender we have used - this not only makes climbing far more efficient, but importantly makes starting the climb easier as no or minimal counterweight is required for the ascender to move up the rope on the first few meters of ascent.

The Harken Ninja Foot Ascender is the only foot ascender which can be used on either foot, with a maximum working load of 1.5kN (330 lbf) and rope compatibility from 8mm to 13 mm (1/2").

Unlike every other foot ascender on the market, the Ninja's dual cam system 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.

The dual cam design allows the cams to be very lightly sprung and this gives the ascender its class leading smoothness.

Another advantage of the dual cam design is that it helps prevent accidental kick-outs.

The Ninja Ascender uses stainless steel cams with transverse ribs instead of barbs which reduces damage to the rope sheath and makes release easier.