[Study Refill Leads]The pencil refill replacement is made of graphite which features , high hardness, long lasting usage and not easy to , will be a good for your deep hole mechanical pencil. [Wide Application]The waterproof and durable carpenter pencil refills can be used in many like woodworking, construction, writing, drawing, sketches, constructions and so on. [Portable Packaging Box]Push the plastic cover to remove the refill, has 6 grooves for each refill, convenient to remove refill and effectively avoid refill breakage. [Fits for Most]The standard 2.8mm round refills replacement fit for Hiboom carpenter pencil as as other mechanical pencil holder. [What You Will Receive]4 packs x 6 refills, you will receive 24 pieces pencil refills; Material:graphite colour:black Package Contents: 24 * pencil refills Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.