HDN 302 - 16 SPR are made from finer , thinner wire 0.40 mm . They are recommended for smaller fish : of course , you must use a finer rod, tippet and etc.
DOHIKU hooks are made from a high carbon steel, which is hardened and tempered according to an exacting formula that makes a long life for them. Of course, they are chemically sharpened.
This material has already become a classic in tying, mainly for Caddis/Sedge larvae and shrimps . It is a water stable and very easy to work with. The fluorescent colours are ideal for shellbacks for shrimps.