替換鎖緊六角螺帽（金屬）

The metal feels solid and the locking mechanism engages with a satisfying click, no wobble once it's on. Fit my receiver pad perfectly, and the nickel warning is a thoughtful heads-up for anyone with sensitivities.

Opened the pack and the threads were clean and sharp, so they screwed on without any wobble or cross-threading. These metal nuts feel solid and grab tight, though the nickel content is worth noting if your skin is sensitive.

These locking nuts fit the pads perfectly and the metal feels solid, not flimsy. I swapped them in this morning and they hold tight with no wobble.