攻牙套組，公制 M3 至 M8 螺紋

The threads on these taps are crisp and clean right out of the box, so my first few tries on aluminum and brass came out perfectly without any binding.

I'd been using an old mismatched set that would bind halfway through, but these cut smoothly from start to finish. Running a M6 die through a test piece gave me clean chips without any wobble, exactly what I needed for my aluminum work.

The threads come out clean and consistent every time, even on tougher steel. Having M3 through M8 all in one set means I rarely have to switch tools mid-project.