The lighter articulated shank, for smaller flies where 0.9mm wire is more than the pattern needs. At a Glance Pack: 28 shanks Wire: 0.8mm stainless steel Lengths: 0.75", 1.0", 1.5", 2.25" Pairs with: Hooks #6 and smaller Ties Well As Small articulated streamers Trout-sized swim flies Compact multi-segment patterns Any fly where the front section gets rebuilt From the Bench Same shank in a lighter wire. On smaller flies the 0.8mm keeps the front section from sitting heavier than the tail.