NT Cutter 18mm Heavy-Duty Ex tra-Sharp Black Snap-Off Blades, 50-Blade/Pack, 1 Pack (BL-51P), 58 degree

Awesome utility knife blade. It's quite sharp, durable, and rust-free, and it's more affordable than Olfa.

NT Cutters (especially my favorite the L-2000RP heavy duty box cutter) are an (IMHO) underappreciated Japanese line of razor cutters, for which these are replacement blades. But you know that, otherwise why would you be looking here! Anyway these are more blades. It takes forever to go through them... this pack will probably last you a lifetime, unless you spend all day every day razor cutting (and maybe you do!).

Wow, these are sharp, Especially reallllly sharp for a bigger blade. Price is awesome for the number of blades you get.

I use these blades on a daily basis in my occupation and they do not dull easy. They are a lot stronger then most 18mm blades I have purchased and I will continue to purchase them because of this. Thanks for a great product.

These blades are excellent. Very sharp, very long-lasting edge. Just what I was looking for. I however, did hit them with a few drops of 3 in 1 oil to keep them from rusting until I use them all, which is about a year.

Much better than the blades in cheap, plastic disposable box cutters -- which are great for lots of uses. These are sturdy. We use them in a DEWALT Utility Knife, Heavy Duty Cutter with Snap-Off Blade, 18mm (DWHT10038). Perfect fit.

I got them for my job as a painter. They work very well. Were exactly what I expected. You can only use a blade for so long, but there is 50 of them!

Better than olfas blades. Buy a ton of these before they’re all gone.

Very good blade, and very sharp. I am very happy with my purchase.

今までBL-50Pの0.45mm厚を使っていたが、これは0.5mm厚でたった0.05mm厚いだけだがしっかり切れる感じが全然違う。 ただ、amazon価格で2倍の価格差（BL-50Pが安くなりすぎ）からするとコストパフォーマンスとして星５個にはならない。

Excelentes, buen filó y durabilidad

This is probably the sharpest box cutter replacement blades I've ever used. Ever after slicing up a ton of boxes and hitting metal staples, I though it lost its edge, it still sliced my skin. Watch out!

I have had the cutter for many years. When looking to order new blades I discovered this heavy duty version. They are very good blades. Really like the heavier, and I rate, better quality.