If the granny knot is the only knot in your repertoire, then you will find this ingenious device useful. It is an effective substitute for an array of knots and fasteners, and can be used to bind two cords together, form an anchor loop at the end of a cord, or add a loop at any point on its length.
Three quick steps (clip, wrap and lock) are all that are required to make a strong, versatile connection. As easy to loosen and remove as it is to tie, it is compatible with any cord from 2mm to 3.5mm (approximately 1/16" to 1/8").
The set of four connectors comes with 25' of 2.5mm dia. cord. Also available separately in 50' hanks, the cord has a highly reflective material woven into it for greater visibility in areas where tripping is a hazard.