great for marking on wood studs even if they are wet. marks a dark line too.

To call Dixon Blue log and lumber professional grade marking tools mere crayons does them an injustice. Imagine my delight at opening my shipment from Amazon. These hexagonal beauties come packaged twelve to a crisp carton, rather than the mere dozen of other competitors. They are the epitome of the state of art in marking system wizardry when used with the famous artisan crafted marker-holders with knurled compression ring and genuine leather handy-lanyard, sold separately. Don't leave home without one.

BUT, and this is important, these are not for the timid or untrained hands nor as toys for children. I don't even allow my pets near them. Be sure to read all instructions and more importantly, adhere to all warning labels. Appropriate safety equipment is a must as the obligatory OSHA hardhat with rotating light and face shield, leg-chaps and off course rugged footgear. And quite naturally the most vulnerable contact points, handgear, should get particular focus. The widely renown, most durable of gloves, made from the indestructible hide of naugha's are not outside consideration. Sacrifices must be made.

One cannot be too careful, for let us not forget the unfortunate happenstances surrounding the Blue Men incident where unprotected sporting in excess led to their disfiguration.

And I hardly need to remind that training is a must. No one abhors the seemingly endless classes and practice more than this reviewer. But marker use is a delicate balance of subtle skills, almost an art form, that few other than the famous Monk Batwaq of the Tibetan Hinterlands, have attained. Even a Forestry/Environmental Science degree is insufficient. Chainsaws. axes, heavy equipment are mere child's play in comparison. After a life time of grueling training and practical hands-on experience, at least I can now say that I have come to a point where I no longer am hurting myself.

Avoid the disappointment of regret and the embarrassment of having made inferior choices. Upside, downside, forwards, backwards, this duo marker/holder system never fails. Choose Dixon.

Lastly, be careful out there and consider Emergency Services on stand by, just in case.

Price was good and they were as expected

I use these for marking concrete. I know they are lumber crayons but they work for what I need. I'd also using for concrete make sure the concrete is raw without any shine or gloss as it will be hard to see

Nice lumber crayons but some arrived broken due to poor packaging. Like other buyers of this product, these arrived loose in a simple mailing pouch with no protection from normal mail handling process. I had to glue two back together with cyanoacrylate. Why won't Dixson ship these in a simple rigid cardboard box like run of the mill Crayola crayons???