M6-1 X 16mm براغي ذات رأس مقبس | رأس زر بمحرك سداسي المقبس | ملولبة بالكامل | فئة 12.9 سبيكة فولاذية مؤكسدة حرارياً سوداء (600 / عبوة)

Put these in a batch of custom tooling clamps and the hex socket drive made tightening them in tight spaces a breeze. The black oxide finish looks clean and professional on the finished assemblies. Haven't had one strip yet even under decent torque.

The threads on these screws are clean and consistent, which made assembly on my jig setup smooth without any binding. The black oxide finish looks professional and seems durable for workshop use. Only minor downside is the pack is too large for my small project.

The black oxide finish on these screws is holding up well against light oil and grime in my jigs. The hex socket drive feels precise and hasn't stripped yet, though I wish they came in a smaller quantity for smaller jobs.