Originally designed as a way to tie big salmon flies with a small treble. Now widely used with single hooks. Slightly tempered for extra strength. Black finish with a leading up eye.Available in 6 sizes.#1 55mm (2 3/8″) (suggested hook size 2-4)#2 45mm (1 3/4″) (suggested hook size 4-6)#3 35mm (1 3/8″) (suggested hook size 6-8)#4 25mm (1″) (suggested hook size 8 – 10)#5 20mm (3/4″) (suggested hook size 10 – 12)#6 15mm (5/8″) (suggested hook size 12 – 14)25pc in a packet