Park Tool 扁平輻條固定器 (BSH-4C)

I was worried about twisting my flat spokes during the build, but the way this holder grips them in those precise slots makes the whole process feel much more controlled.

The four different slots really do hold every size of bladed spoke I've thrown at them, making truing faster without the spoke twisting back on me. It's a simple tool but it just works perfectly for wheel building.