Perfect leads for my pencils at work.they workI remember my uncle using these types of crayons when I was just an apprentice tile setter, I never could find a retailer that carried them in town. Always had to settle for the paper wrapped kind that would usually break or fall apart before you got half way through it. I love the durability and time saving with these, I don't understand why tile supply stores don't stock these. Very satisfied with this purchase, I will definitely restock with these when the time comes again. Buyer beware you won't want to go back to the cheaper paper wrapped junk again. ;)I am delighted with these red pencil sticks. As a magician, I frequently use these pencils in my routines as they are excellent for marking plastic or coins. Unlike dry erase or wet erase marking pens, the markings remain more steadfast, but the markings can be easily removed with a cloth or tissue on most impervious surfaces. I highly recommend these pencil sticks. The Listo pencils offer the convenience of being encased in a retractable barrel as opposed to a "peel-type" exposed pencil tip. Both, however, have their advantages.Very visible even from a distance. Use then to mark poles and it's easy to seeI grew up with this and scripto brands.Use it on all kinds of different things.Writes on almost every surface...great product and still aroundIt's exactly what i wantedWorks for what I needed. Decent price.good product, good price and delivered on timeit is great lead but is short