The world famous TIE-FAST Magnum Knot Tyer is the larger version of the famous ultimate 'nail' knot tool. Made of one piece stainless steel, this tool enables anglers to tie secure knots in a matter of seconds. It can be used to tie a number of different varieties of the 'nail' knot. This Knot Tier is praised by fly fishers for its simplicity and for the strength of its knots. It can be used to tie a number of different varieties of the 'nail' knot.