扳手，車床夾頭，6.5mm方形

The 6.5 mm square end fits snugly into my mini lathe's chuck, and the metal feels sturdy enough to handle daily use without bending.

I needed a replacement for a worn-out key, and this one fits my 1/4-inch chucks perfectly without any slop. The steel feels solid and the knurling gives a good grip even with oily fingers. It's just what my small lathe needed.

The 6.5 mm square end seats snugly in my chuck without any wobble, which is a relief after dealing with sloppy keys. It’s a solid, basic tool that does exactly what it’s supposed to for bench-top work.