手環及手鍊成形心軸 — 圓形階梯式木質，附固定用榫頭

The four stepped sizes are so much handier than the tapered mandrels I've used before, since I can just drop a ring to the next groove and know it's the exact same diameter every time. The tang clamps solid in my bench vice and the hardwood hasn't dented once, even after a few dozen pieces.

I make a lot of copper bangles and got tired of guessing sizes on a taper, so having four fixed diameters means every batch matches. The tang clamps solid in my bench vice and the hardwood hasn't dented after a dozen hammering sessions.

I've spent a whole afternoon hammering out copper bangles and the wood grain hasn't splintered or left a single mark on the metal. The vice mount held it rock-solid through every pass, which makes the stepped diameters feel genuinely reliable for repeat work. My silver rounds came off the tool with