These are decent permanent markers, and they do indeed write on a variety of surfaces.

Nice markers, but have since faded, hence only 4 stars

Doesn't write on wet as well as I would've hoped, but other than that, great kitchen marker

Most "permanent" markers either smear with soap and water or sweat, or simply fade.

Love these markers.

This marker is great: does NOT smear at all, does not fade.

In closing, they are fine markers, but for my uses they perform little better than regular Sharpies.

I like these markers for many purposes

Excellent markers - excellent price!

Previous reviewers faulted the markers because their marks erase with alcohol, but that is a plus for me because I wanted an erasable pen for remarking on plastic garden markers.

I work in a lab where we frequently sterilize equipment with 70% ethanol, so an alcohol-resistant marker is very important for samples/supplies we want to keep labeled!

Great, tough, permanent markers for all your permanent marking needs.

These markers are great for everything

Very good marker

it said the marker is waterproof but the marker still doesn't work.

Great markers.

Best dang markers this side of oil-based paint markers.

This is my husband's favorite permanent marker pen!

The sharpie industrial markers are awesome.

Amazing marker, we tested it on a Petri dish and sprayed with alcohol 70%, it goes away only if you rub it with blotting

Excellent, the best indelible ink markers I've used.