The Hultafors Tools Dry Marker Refills can be attached with a clip in the pocket or tool bag. The design of the container protects the leads during transport and only ejects one lead at a time. The dry marker refills are available in two combinations. HRD G offers 10 leads in durable graphite, while Hultafors HRD GRY offers 4 graphite leads and 6 leads in chalk (3 red and 3 yellow). The refills also come backed by a 1-year warranty for purchasing assurance.