方形扣環製作鉗 — 中型芯軸6公釐與8公釐，用於珠寶與手工藝的 wire looping

I was tired of fighting round-nose pliers to get crisp corners. The 6mm mandrel on these made perfect square links for my geometric earrings on the first try — no slipping or twisting.

The two flat mandrels finally give me crisp 90-degree corners on every link, which round-nose pliers never could manage. I used the 6mm side for a chunky chain and the 8mm for a pendant bail, and both held their shape perfectly under light hammering.

I've spent years fighting with round-nose pliers to get a clean square bend, and these mandrels are a total game changer. The 6mm and 8mm flats give you a really crisp, sharp corner on every loop without any wobble, and they're solid enough for daily wire work.