2.8mm HB Refills HB hard carpenter pencil refills offer good toughness and high hardness, making them resistant to breakage. Ideal for use on hard or rough surfaces such as wood, suitable for scribing, field drawing, and similar tasks. Compatible with Most 2.8mm Pencils Standard 2.8mm round silver woodworking pencil refills are designed to fit most 2.8mm mechanical pencil holders and can replace any 2.8mm refill from various brands. Wide Range of Applications HB silver carpenter pencil refills are suitable for a variety of tasks including woodworking, construction, writing, drawing, sketching, and other professional or DIY projects. Convenient Storage Container The refill box features a push-open plastic cover and includes 6 grooves to securely hold each refill. This design allows for easy removal and organized storage, helping to prevent breakage. Package Contents 4 packs × 6 graphite refills (24 refills total)