1. SF 2 In 1 Fly Fishing Angler Accessories Knot Tying Tool with Carabiner Zinger (Click Link to Check Price on Amazon)
Editor's Rating : 9 out of 10
The 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.

2. Booms Fishing K1 Fly Fishing Knot Tying Tool (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
[Secure]Protect your hands, do not empty-handed fishing line knot tying dangerous. Tie your lines securely in a matter of moments and don't worry about your knot coming undone.[Tying easily] Make it easier to tie fast, especially tying Nail knot.

3. TYEPRO Fishing Tool (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
Helps thread line through eyelets of small hooks and jigsSimplifies tying some fishing knots

4. HOOK-EZE Fishing Hook, Swivel, Line, Safety Tying Device, Line Cutter & More (YELLOW) (Click Link to Check Price on Amazon)
Editor's Rating : 9.3 out of 10
^ CHOOSE YOUR COLOR ^ ABOVE ^Safely hold hook while tying to fishing line eliminating painful injuries.

5. Lake Products THREE-in-One Knot Tying Tool Fly Fishing (Click Link to Check Price on Amazon)
Editor's Rating : 9.7 out of 10
Precision machined contact firmly grips any fishing line, without causing damageUp and down spring action with stainless steel spring