Well, thats one lesson learned

[Luckylefty01]

I guess now I know not to offer to cut a large fiberglass heater filter in half for my mom with my 2 week old rittergrip, when I'm waiting till christmas to see if I can get a sharpmaker as a gift^^. I have to admit it did do a very nice job making the cut though, but now it's just a tad on the dull side.

 

[HoB]

Yeah, I hate the fiberglass reinforced packaging tapes that are all the rage these days .

Fiberglass is still glass, kills an edge faster than anything I've ever seen, short of dragging your blade over sandpaper.

 

[Knifeclerk]

Durring our last order at work, I had to use my BM 710 to cut a plastic cord that was holding a dagger in its box. It was really freaking hard to cut and I was soooo embarrased (Even though nobody was around except my coworker.)! Only after I cut through it did I realize that the thick plastic cord was just a cover to a thick metal wire. Then I wasn't so embarrased. It was still pretty dang sharp too!
This... This may not have actually related to this topic at all.
...

 

[Esav Benyamin]

Fiberglas is probably one of those characteristic materials that really calls for serrations. Or snips.

 

[Daniel Dorn]

I used the serrated blade on my large Swiss Pliers for fiberglass insulation. It worked longer than the utility knives. Of course it ate the tip of the blade pretty well, but I touched it up with a diamond file.

I've used my M2 bladed Benchmade on sheet-rock, and it held up remarkably well. Would still push shave on my arm.

DD