Tools of the trade: Koh-I-Noor Hardtmuth solid graphite pencils Posted on 10/13/201510/12/2015 by Smokie Graphite pencils are amazing. Koh-I-Noor Hardtmuth happen to be the best I’ve personally used. Koh-I-Noor Hardtmuth solid graphite pencils Share this:TwitterFacebookRedditPocketMoreTumblrEmailPinterest You might also like: