Twin Dancer hooks are to improve catch rate for trout. With the Twin Dancer hooks, spoons work better with less dragging from hooks. Twin Dancer hooks are tied with soft braided leader allowing spoons more freely. AND, Twin Dancer hooks also reduce hook-offs after they hooked on fish. Single hooks penetrate jaws deeper than treble hooks, and the flexible leader keeps the hooks hooked at jaws.
This TD-41 has heavier wire hooks, great for 8-16lb test lines.
Best matching, S for 5g or less, M for 5-8g, L for 8-15g