跳環與線圈成形心軸 — 2件式鋼鐵組合，紅色手柄，用於纏繞

I’ve been using these steel mandrels for a few weeks now, and the stepped design makes it easy to switch between coil sizes without guessing. The red handles are a nice touch—they’re comfortable to grip and help keep the wire steady during winding.

The red handles give a solid grip even when my fingers get sweaty from twisting wire, and the stepped sizes mean I can knock out a dozen matching coils in one sitting without measuring anything. I’ve used mine almost daily for a month and the steel still looks brand new, so the durability is definit

I was tired of uneven rings, but these stepped mandrels finally give me consistent diameters every time. The red handles make them easy to grip while winding tight coils.