Designed and manufactured with precision for optimum performance, the rOtring Isograph Master Set has everything you need to complete projects on time. Featuring three high-precision technical pens with refillable ink reservoirs, it is perfect for college-level students. Pens are made to be wear-resistant and the hard chrome-plated thin tip allows for exquisite details. When it's time to switch to a pencil, the Tikky mechanical is ideal for all day writing, drawing, drafting or sketching. A pack of 12-piece high-polymer leads are included for refills. A bottle of highly-pigmented ink, a premium eraser and a compass attachment are also packed together for all your needs.