Hook Blade 10 Pack - Utility Knife Hooked Razor Blades in Storage Box - Heavy Duty SK5 Replacement Refills for Carpet, Roofing Knife, Box Cutter

Serrated utility blades! Who knew? These are great! They pop right into an Otacle U1 (which won't accept the longer utility blades). The serrated edge doesn't seem sharp until you try to use it... then you will understand. Will buy again if I run out...

Work great.

I purchased both straight edge and now serrated replacement blades. They fit perfectly and are great blades. The packaging is a nice detail...two sleeves of 10 blades each. Unlike most packaging, these come in a plastic zip lock bag, making spare blades easy to store in the covered hard plastic case.

Saw this on Youtube when watching carpet installers in the UK. Was having difficulty cutting carpet with traditional blades and utility knives and decided to give it a try. What an improvement the serrations make. Wow! Worth the cost if you need to cut carpet, thick plastic, difficult materials. Doesn't dull as quickly as regular blades. Anything that makes a task enjoyable instead of difficult is worth it.

Razor sharp, of course, and fits my wonderful Amazon box cutter fine. Ten blades come in a small plastic box, so when I'm fumbling in my tool chest for a new blade, I will come up with one without any bloodshed.

Blade seemed a little dull at 1st, but did all right.

Sharp comes in a convenient case

Excellent quality and fast shipping