براغي رأس أسطوانية مقاس 1-1/8-7 × 6-1/2 بوصة | محرك سداسي | خيط جزئي | فولاذ سبائكي بطبقة أكسيد أسود حراري (2 / عبوة)

The black oxide finish wiped clean easily and hasn't shown a hint of rust after a week of shop use. Threads engaged smoothly into my tooling plate, and the hex socket drive took torque without stripping.

The black oxide finish on these gave them a nice, grippy texture straight out of the package, and the hex socket drive made seating them in my jig a breeze. I've torqued them down hard and they've held firm without a hint of stripping.

The partially threaded shaft grabbed perfectly in my jig block without bottoming out, so that 6-1/2" length is just right once you account for thread engagement. Hex socket drive seated a standard allen key with no slop, though I wish the 2-pack came with washers.