The X-Stand Safe Climb unique rope safety system uses a Prusik knot that has been used by mountain climbers for years to help keep them safe while they climb a vertical rope. X-Stand uses the same concept to make sure hunters stay safe while climbing up and down from their treestands. The Prusik knot slides up and down the climbing rope while you ascend and descend and cinches tight to stop you if a fall does occur. Includes a 30' Nylon rope. Supports up to 500 lbs.