GoldblattInsulation Knife, 8 Inch Stainless Steel Blade - Serrated Sharp Double Side Insulation Cutter Tool for Cutting Heat Material, Styrofoam - Rockwool Sod Cutter Lawn Repair Garden Knife

This is essentially a long, serrated bread knife with a coarse and finer serration. The length and super comfortable handle make it perfect for cutting rockwool insulation. It's easy to handle and looks great.The included sheath is a nice touch though this wasn't particularly useful for me. In any case, the knife is nice and sharp and feels premium, appropriate for the price.I'll probably never need to use it again but it made insulating my shed a LOT easier.

Does what it is supposed to do - Makes installing rock wool insulation a breeze. It is long enough for R30 and is short enough not to get in the way. I had my doubts that it wouldn't be long enough but glad I purchased this. I am into the job several pallets of insulation and it is still sharp and going strong, can't say the same for the installer!

Great knife. Cuts through rockwool like butter.

I wish I had one of these years ago. This thing is awesome. Cuts rockwool with ease and almost no mess

Knife works great for cutting rockwool. Good price.

Couldn’t find a knife at my local lowes so had to order this one to install rockwool.It’s a glorified steak knife in reality with two different serrations.It does its job but doesn’t cut as clean as I’d prefer. It left some connections of the insulation or ended up ripping so if it but it’s better than say an exactoknife or anything of the sort.Kind of expensive considering you can usually get these locally for $10 or less.Do like the belt sheath though and the comfortable handle.

Worked very well to trim 3000 square feet of grass sod we recently installed in our yard. Saved time and was more accurate.

Great kitchen tool. The heat cuts through brownies with ease without tearing them up.