This mechanical pencil set is great for engineers, painters, designers for drawing, drawing, sketching, designing.SpecificationMaterial: Metal Aluminum HolderOverall Size: 160 x 10mm (L*W)Packing List: 1 pcs Mechanical Pencil Holder( with 20pcs 2B Pencil Lead )AdvantageThe mechanical pencils holder hand grip is non-slip and feels comfortable.The Lead Pencils cap has a sharpening function, which is convenient for you to sharpen the refill at any time.This mechanical pencil holder has a metal clip, which can be fixed in a book or clothes pocket to prevent it from falling.Instruction1. Prepare mechanical pencil and refill.2. Put the refill into the pencil.3. Press the cap and the refill will come out.Note: when pressing down the cap, the length of the core should be controlled to prevent the entire refill from falling out.