Vanfook, a hook manufacturer in Japan, Expert Hooks are specifically designed for trout fishing.
This SP-41MB is for spoons, with medium heavy wire, and micro barbs to be used at trout ponds, lakes and etc. Recommended for up to 1.5kg/3lb fish, with 3-6lb test mono lines. Matches well to spoons of 1.0-1.2g #10, 1.5-2.0g #8, 2.2-3.5 #6, 4-5g #4. Made in Japan