The TIE-FAST Knot Tier is the ultimate "nail" knot tool. Made of one piece stainless steel, this tool enables anglers to tie secure knots in a matter of seconds. The TIE-FAST Knot Tier is praised by fishing experts 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. Unlike other knots that have only one turn holding their ends, the "nail" knot cannot become untied because the tag end of the line is secured by all turns of the knot.