hooked cutting blade

A while back, I got a dispenser of 100 Stanley cutter blades that have a C hook on both ends of the blade. I would guess they would be for cutting cordage by hooking the cordage and pulling. Is that it, or are there other uses?
Steve
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Steve B wrote:

Carpet layers use something like that.
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I really wish I'd had one the other day while trying to cut the tape securing a duct to an air handler (especially in the back)...
Maybe for opening taped boxes...
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Some roofers use them. I never mastered the art with roofing.
RonB
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wrote:

Some roofers use them. I never mastered the art with roofing.
RonB
I have never ever in my life had the urge to be a roofer. Or a mortician. With each person, there's just some things that one will not do.
Steve
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The only hooked blades made for a standard utility knife that I have ever seen are made for roofing. Mostly to cut the shingle overhang.
I have never mastered the art of using them.
Colbyt
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I bought the "large pack" when I needed to remove some linoleum.... they worked well for cutting the linoleum.
They also work on carpet but I use them so seldom I still have way more than half of them left.
cheers Bob
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