I bought this set of pencils for wood working and building a variety of things made out of wood. I'm a DIYer. And not paid for nor asked for this review. I read a lot of reviews and do my due diligence before buying. I get elated when I find a product that meets all my expectations. So I want to make sure you get the truth.I was using a pencil and constantly needing to sharpen for precision measurement marking. I tried a mechanical pencil, maybe I have a heavy hand, the lead kept breaking off. I tried the flat carpenters pencil. Nothing seem to work for me! Then I saw this set. A mechanical pencil with a carpenter pencil size lead. Plus, it comes with Black, Red and Yellow pencil and pencil lead. Yes- three pencils as the picture shows. Even comes with re-fills. I've been using these for 4 months (mostly the black pencil) and only half way through the first lead stick. What I like best, is the fact that each pencil has its own sharpener built into the head of the pencil. It unscrews to use an screw it back-in to store it. Your never with out your sharpener! And I have not broken the lead tip not once. Knock on wood!!.Its become the first thing I grab from my tool box when commencing to make anything now. I took a chance on the idea that a thicker lead would suit my needs. And it did! Perhaps it will for you too. I've used all 3 colors. Even the yellow it comes in handy when your working on something dark or black, yellow shows up well.This pencil set comes with three complete mechanical pencils (Black, Red and Yellow), a spare sharpener and a sharpener is in the end of each pencil, you'll have a total of 4 sharpeners, also comes with a metal scribe (the only thing I haven't really used) and a spring loaded punch with a large red knob on the end making it easier on the hand, unlike than the one I already have. I use this one now. A must have for your tool box.