Package includes: 10 boxes colored refills, each box contains 12 refills, total 120 refills. Each box contains 6 different colors refills. The 0.70mm thickness is perfect because the tip doesn't break off as easily.If you're heavy handed and use a lot of pressure when you draw/write, try and relax your wrist a bit. These smooth mechanical pencil refills are perfect for drawing, sketching, writing, editing, distinguishing parts of your construction lines, coloring, journaling, taking notes, marking textbooks or scriptures, color coding, engineering drawing markups and doing puzzles. The vibrant leads can be us as a stocking stuffer, will be a perfect gift for kids, students, teachers, artists and writers. Also, they are suitable for using at home, school and office.