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.