The world famous TIE-FAST Knot Tyer 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 Tyer is praised by fishing experts for it"s simplicity and for the strength of it"s 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