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The HAAS is a unique ascent tool designed by Michael Frankhauser of Ohio. It gives the climber an easier and faster way to ascend. It can be added to double rope systems, SRT systems, with the Rope Wrench, the Hitchiker, or without. The HAAS features a fully integrated knee ascender that captures all of the advancement made by your other foot. If you ever thought it would be cool to use two foot ascenders, here is your chance. The HAAS is sold in regular length and long length.