OKnife Ceramic Utility Blades Black - Pack of 10

Say goodbye to rusty, dull blades forever. The OKnife NUB2CB black ceramic replacement blades are the ultimate upgrade for your everyday utility knife.

Crafted from high-purity zirconium oxide (ZrO2), these blades are:

10× sharper than steel right out of the package
Completely rust-proof and chemically inert – safe for food, medical, and clean-room environments
Insanely wear-resistant – stay razor-sharp 50–100× longer than traditional carbon or stainless steel blades
Non-magnetic and non-sparking – perfect for electronics work and explosive environments

The sleek black finish isn’t just for looks: the advanced coloration process adds an extra layer of surface hardness while maintaining the legendary edge retention ceramic is famous for.

Each blade features the universal 2-point snap-off design and fits nearly every standard utility knife and box cutter

Key Features:
Material: Advanced black zirconia ceramic
Blade style: 18 mm wide, 8-point snap-off segments
Thickness: 0.9 mm (perfect balance of rigidity and safety)
Quantity per pack: 10 blades (80 fresh segments total)
Never rusts, never dulls, never needs sharpening

Whether you’re a professional tradesperson slicing insulation all day, a warehouse worker opening boxes non-stop, or just want the cleanest, longest-lasting cuts at home, OKnife black ceramic blades deliver unmatched performance and convenience.

One blade truly can last months. Try them once – you’ll never go back to steel.