Compatible drawing supplies - Ideal for writing and drafting; refill pen refills provide reliable performance with fine lines that sketch precision and meet multisize pencil lead requirements for all major applications. Smooth writing experience - Flexible core design delivers smooth writing and improved lead-break resistance for reliable use with durable pencil refills. Comfortable drawing tool - Delivers reliable performance with minimal drag for comfortable drawing sessions. Safety and sustainability - Child-safe materials and packaging designed to be recyclable; our approach supports sustainable production with low environmental impact. Use scenarios - Technical drafting and architectural sketches: produce precise lines, annotate plans, and switch between lead sizes as needed for different tasks. - Classroom or educational drawing: safe, easy-to-use tool for students to practice measurements, shading, and line work without compromising safety. - Personal illustration and journaling: create fine-line notes and quick sketches with smooth, consistent lines for concept development. Attributes and performance - Function: writing and drafting tool with refill compatibility for fine lines. - Compatibility: supports multisize pencil lead refills for major applications. - Size: designed for precise, controlled drawing with a flexible-core mechanism. - Material: child-safe materials; recyclable packaging with sustainable production methods. - Performance: smooth, low-drag writing with lead-break resistance for reliable daily use.