NRSSpeed BurnerProtects -knotAssorted ColorsSPEEDBURNSpeed BurnerNRS World "All Things Western"NRS Speed Burner protects the -knot from wear and helps -knot hold shape and rope slide through.National Roper's Supply (NRS) works to bring you the best quality and value in everything that you need to enjoy horses, team roping and the western lifestyle. NRS is rooted in tradition. From saddles, ropes, headstalls, bits and other tack, to cowboy boots, cowboy hats, and western wear, we offer everything you need to do whatever you love.