Stone Creek EZ-TY Knot Tool - Our EZ-Tye Knot Tool makes tying flies onto your leader much easier by holding the bend of the hook while you tie in. It allows you to tie a cinch knot with ease and is great for small to large flies. Effective for all fly sizes down to #24. Makes tying extra-small flies EZ Acts like a handle for your hook Extendible wire grips hook at the bend Retracts to hold hook tightly in place Effective for all fly sizes down to #24 Use the EZ-Ty Jr for flies from sizes #16 - #24.Use the EZ-Tye Sr. for flies from #02 - #14.