Hartman Hook, Ergo Handle Hook Direct and handmade from Ireland of brass & yew wood. The ergonomic (ergo) handle has a flattened section making it much easier to hold and use.
2mm is perfect for a #3 cut.
3mm works best with #3, #4 or even #5.
5mm works with variety of cuts but is best with #4, #5 and #6.
6mm works well with almost any size cut. It is the first choice for many hookers
8mm works with a #8 cut and larger.