براغي HOLO-KROME 33070 #10-32 X 1-1/4" Cup Point Socket Set | فولاذ سبائك معالج أسود حراريًا (100 / عبوة)

The black oxide finish on these really does resist corrosion well—I've had them on a machine shaft for two months with zero rust. The cup point design grips tightly without marring the surface, which is exactly what I needed for clamping adjustments.

I was a bit worried about the hex socket stripping under torque, but these held up perfectly through a dozen adjustments. The black oxide finish also feels like it’ll resist rust better than the plain steel ones I’ve used before.

These little cup point screws bite into the shaft perfectly, no slipping under heavy load. The black oxide finish made them easy to handle without glare, and all 100 in the package were cleanly threaded.