I have used these fantastic Koh-I-Noor mechanical clutch pencils for years and cannot recommend them highly enough. Using a mechanical pencil is, I have found, much better than using a traditional pencil for a number of reasons. One being that the pencil always stays the same length but also because they take a little more punishment. I have dropped mines countless times and have never managed to break the lead once. You also never need to sharpen a mechanical pencil so that’s one more piece of kit you don’t need to take sketching.
These pencils are quite thick and take a 5.6mm lead so are fantastic for loose sketches. I personally use a 6b lead which means I can get a nice dark line without having to press too hard on the paper and thus leaving a ridge but you can choose from either 2B, 4B or 6B.
(Please note the pencil is supplied with 1 x 2B lead. Refill leads must be purchased separately)