ADJUSTABLE LINE WIDTH: Equipped with a adjustment screw, this ruling pen set allows artists to effortlessly switch between fine and broad strokes, enhancing versatility in drawing, calligraphy, and technical illustrations. CONSTRUCTION: Each pen in this set is constructed with robust iron tips and PP plastic bodies, ensuring durability and comfort even during long drawing sessions, making it a reliable choice for professionals and hobbyists alike. VERSATILE ARTISTIC APPLICATIONS: Ideal for a wide range of artistic endeavors, these pens are perfect for detailed line art, drafting, technical designs, and applying masking fluid with , catering to both amateur and professional artists. EASY TO USE: To achieve smooth and consistent lines, simply dip the pen into your chosen ink, hold it perpendicular to the paper, and apply even pressure. This straightforward method ensures precise and beautiful results every time. COMPREHENSIVE SET: This set includes four ruling pens of varying sizes, from 4.83 to 5.71 inches, tailored to meet different artistic needs and preferences, making it an essential toolset for any artist's toolkit. Description/Features: This 4-piece ruling pen set is expertly crafted for artists and drafters who demand in their endeavors. Each pen in the set is equipped with an adjustable screw mechanism that allows for meticulous control over line width, enabling the creation of both fine lines and broader strokes. The pens are constructed with robust iron tips and ergonomic polypropylene bodies, ensuring both durability and comfort during prolonged use. This set is ideal for anyone seeking tools that offer both and reliability in their artistic work. Specifications: Material: Iron tips, Polypropylene bodies Sizes: Pen 1: 14.5cm x 0.98cm x 0.5cm (5.71in x 0.39in x 0.20in) Pen 2: 13.6cm x 0.68cm (5.34in x 0.27in) Pen 3: 12.63cm x 0.69cm (4.97in x 0.27in) Pen 4: 12.