72 pieces marker refills: The graphite lead core has been optimized to improve durability and moisture resistance. 72 pieces refills can be used with carpenter pencils (12 red, 60 black) Comfortable design and easy to control: handy pen-style design with convenient pocket clip, nice weight balance and a comfortable non-slip knurled aluminum grip which provides maximum control Excellent Drafting Pencil: the design of the refill extends the life of the carpenter pencils, easy to use, strong and hard to be broken, suitable for , builders, businessman, or anyone who needs a tough pencil that will mark a of surfaces. Colour: blue + black Material: metal + plastic Package Contents: 6 x pencils (3 blue + 3 black) 6 boxes x refills (3 blue + 3 black) 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.